Why Is Microsoft Teams Video Freezing During Screen Share?

You are in the middle of an important presentation. Your screen share is running, your slides are up, and then it happens. Your video freezes. Your colleagues see a still frame of your face while your voice keeps going. Or worse, the entire screen share turns into a slideshow of choppy frames.

This is one of the most common and frustrating problems Microsoft Teams users face today. Video freezing during screen share affects millions of professionals daily, disrupting meetings, stalling demos, and making remote collaboration feel broken. The good news? This problem is almost always fixable.

In this post, you will find every practical solution to stop Microsoft Teams video from freezing during screen share. Each fix is broken down into clear steps you can follow right now. Whether you use Windows or Mac, the classic or new version of Teams, there is a solution here for you.

In a Nutshell

• Low bandwidth is the top cause. Microsoft Teams needs at least 1.5 Mbps for a quality video call with screen sharing. If your internet speed drops below this, video will freeze while screen share continues. Check your speed and close other bandwidth heavy apps before meetings.
• Hardware acceleration can backfire. GPU hardware acceleration is meant to improve performance, but on many systems it causes video to freeze or stutter. Disabling this setting in Teams has fixed the issue for thousands of users.
• Corrupted cache files build up over time. Teams stores temporary data locally, and these files can become corrupted. Clearing the Teams cache is one of the most reliable fixes and takes less than two minutes.
• Teams defaults to low frame rates for screen sharing. The app assumes you are sharing static documents, so it drops the frame rate. You can force a higher frame rate using a keyboard shortcut or the new Optimize for Video toggle in the presenter toolbar.
• Outdated graphics drivers and Teams versions cause conflicts. Running old software creates compatibility issues that show up as frozen video. Updating both Teams and your graphics driver often resolves the problem immediately.
• VPN connections and Wi-Fi interference add hidden lag. VPNs add extra encryption and routing hops that slow real time media. Weak Wi-Fi signals on the 2.4 GHz band also contribute to freezing. Switching to a wired connection or the 5 GHz band can make a big difference.

Understanding Why Teams Freezes Video During Screen Share

Microsoft Teams handles video and screen share as two separate media streams. Your camera feed is one stream. Your shared screen is another. Both streams compete for the same bandwidth and system resources. When resources run low, Teams prioritizes the screen share content over your video feed.

This is by design. Microsoft built Teams to keep shared content visible even if video quality drops. The system reduces the video frame rate or freezes it entirely to preserve the screen share. You might not notice this on your end because your local preview still looks fine. But your colleagues see a frozen image of your face.

The problem gets worse with larger meetings. Each participant adds load to the connection. A call with ten people sharing video requires far more bandwidth than a one on one chat. When you add screen sharing on top of that, the demand increases further.

System resources matter too. Teams uses your CPU, GPU, and RAM simultaneously. If your machine is already running memory heavy applications like browsers with dozens of tabs, design software, or development tools, Teams may not have enough processing power to maintain both streams smoothly.

Check Your Internet Speed and Bandwidth

Bandwidth is the single biggest factor in Teams video quality. Microsoft’s own documentation states that a one on one video call with screen sharing needs at least 1.5 Mbps upload and download for recommended quality. For meetings with multiple participants, that number jumps to 2.5 Mbps upload and 4 Mbps download.

Start by running a speed test before your next meeting. Use any free speed test tool and check both upload and download numbers. If your upload speed is below 1.5 Mbps, you have found the likely cause of your freezing video.

Close other applications that use bandwidth. Streaming services, cloud backup tools, large file downloads, and other video calls on the same network all compete for the same connection. Ask other people on your network to pause heavy downloads during important calls.

If you work from home and share your connection with family members who stream video or play online games, consider scheduling critical meetings during off peak hours. A wired Ethernet connection will always outperform Wi-Fi for stability and speed. Even a simple USB Ethernet adapter can eliminate the packet loss that causes freezing.

Disable GPU Hardware Acceleration in Teams

GPU hardware acceleration tells Teams to use your graphics card for rendering video and interface elements. In theory, this should improve performance. In practice, it causes freezing and stuttering on many systems, especially older laptops and machines with integrated graphics.

Disabling this setting has resolved the freezing issue for a large number of users. Here is how to do it.

For Classic Teams, open the app and click on your profile picture. Select Settings, then go to General. Find the checkbox labeled Disable GPU hardware acceleration and check it. Restart Teams for the change to take effect.

For the New Teams app, the location of this setting may differ. Go to Settings, then General, then Application. Look for the toggle labeled Use hardware acceleration when available and turn it off. Restart the app.

After restarting, join a test call and share your screen. If the video freezing stops, hardware acceleration was the culprit. Keep it disabled unless you upgrade your graphics hardware or drivers in the future and want to test again.

Clear the Microsoft Teams Cache

Teams stores cache files on your computer to load faster and remember your preferences. Over time, these files can become corrupted or bloated. Corrupted cache is one of the most common causes of freezing, lag, and unexpected crashes in Teams.

Clearing the cache forces Teams to rebuild these files from scratch. The app may take a little longer to start the first time, but performance often improves dramatically.

For New Teams on Windows, the quickest method is to reset the app. Open Windows Settings, go to Apps, then Installed apps. Search for Microsoft Teams, click the three dots, and select Advanced options. Scroll down to the Reset section and click Reset. Restart Teams.

You can also manually delete the cache files. Press Windows Key + R to open the Run dialog. Paste this path: %userprofile%\appdata\local\Packages\MSTeams_8wekyb3d8bbwe\LocalCache\Microsoft\MSTeams. Delete all files and folders inside.

For Mac users, quit Teams completely. Open Terminal and run: rm -rf ~/Library/Group Containers/UBF8T346G9.com.microsoft.teams followed by rm -rf ~/Library/Containers/com.microsoft.teams2. Restart Teams after running both commands.

Make a habit of clearing the cache once every few weeks, especially if you use Teams heavily.

Enable High Motion Screen Sharing

Here is something most Teams users do not know. By default, Teams uses a very low frame rate for screen sharing. It assumes you are sharing static documents like Word files or spreadsheets. This low frame rate preserves resolution but makes any motion look choppy or frozen.

When you share a video, an animation, a live demo, or even scroll quickly through a webpage, the low frame rate cannot keep up. The result looks like your screen is freezing for the other participants.

You can fix this by enabling high motion screen sharing. Start your screen share in a Teams meeting. Then press Ctrl+Alt+Shift+T on your keyboard. You will not see any visual confirmation, but Teams will switch to a higher frame rate. Ask a colleague if the experience improved.

This keyboard shortcut is a toggle. Pressing it again returns to the default low motion mode. Note that Microsoft is phasing out this shortcut in favor of a new feature.

The newer Teams versions include an Optimize for Video button on the presenter toolbar. When you start sharing your screen, look for the optimize icon on the floating toolbar. Click it to enable smoother playback for high motion content. This is the recommended method going forward.

Update Microsoft Teams to the Latest Version

Running an outdated version of Teams is a recipe for performance problems. Microsoft releases frequent updates that fix bugs, patch security issues, and improve video and screen sharing performance. Many freezing issues exist only in older builds and have already been fixed in newer releases.

Teams usually updates automatically, but this process can sometimes stall. To manually check for updates, open Teams and click on your profile picture. Look for Check for updates or About Teams in the menu. If an update is available, install it and restart the app.

If you are still running Classic Teams, consider switching to the New Teams app. The new version uses a different engine that handles memory and CPU more efficiently. Some users have reported that simply uninstalling Classic Teams after moving to New Teams resolved persistent freezing issues. Having both versions installed simultaneously can cause conflicts.

On managed work devices, your IT administrator may control when updates are deployed. If you suspect an outdated version is causing problems, contact your IT team and ask them to push the latest release.

Update Your Graphics Drivers

Your graphics driver translates instructions from Teams into visual output on your screen. An outdated or corrupted graphics driver can cause video to freeze, stutter, or display incorrectly during screen sharing.

This fix is especially important if you recently updated Windows or Teams. Sometimes a system update breaks compatibility with older drivers, creating conflicts that show up only during video calls.

For Windows users with NVIDIA cards, visit the NVIDIA website and download the latest driver for your specific card model. For AMD cards, use the AMD Software tool to check for updates. If you use Intel integrated graphics, which is common on laptops, go to the Intel Driver & Support Assistant page.

You can also update drivers through Device Manager. Right click the Start button, select Device Manager, expand Display adapters, right click your graphics card, and select Update driver. Choose the option to search automatically for updated driver software.

After installing a new driver, restart your computer fully before testing Teams. A simple restart is required for driver changes to take full effect.

Close Unnecessary Background Applications

Teams is a resource heavy application. When you add video, screen sharing, and chat all running at once, it demands significant CPU and memory. If other applications are competing for these resources, Teams will sacrifice video quality first.

Open Task Manager on Windows (Ctrl+Shift+Esc) or Activity Monitor on Mac before your next meeting. Sort processes by CPU or memory usage. Look for applications consuming large amounts of resources that you do not need during the call.

Common culprits include web browsers with many open tabs, Slack or other communication apps, cloud sync tools like OneDrive or Dropbox actively syncing files, music streaming apps, and development environments. Close or minimize anything you do not absolutely need during the meeting.

Browser tabs are a hidden drain. A single Chrome tab can use 200 MB or more of RAM. If you have 30 tabs open, that is 6 GB of memory competing with Teams. Bookmark what you need, close the rest, and reopen them after your call ends. This single change can free up enough resources to eliminate video freezing entirely.

Switch From Wi-Fi to a Wired Connection

Wi-Fi introduces three problems that wired connections do not have: latency, packet loss, and interference. All three directly cause video freezing in Teams.

Latency is the delay between sending and receiving data. Wi-Fi adds more latency than Ethernet because the signal must travel through the air and compete with other wireless devices. Packet loss happens when data packets fail to reach their destination. Even a 1% packet loss rate can cause noticeable video freezing. Interference from other Wi-Fi networks, Bluetooth devices, microwaves, and other electronics on the 2.4 GHz band makes both problems worse.

The fix is straightforward. Use an Ethernet cable. Plug your computer directly into your router or a network switch. If your laptop does not have an Ethernet port, a USB to Ethernet adapter costs very little and works immediately.

If a wired connection is not possible, improve your Wi-Fi situation. Move closer to your router. Switch to the 5 GHz band if your router supports dual band. The 5 GHz band has less interference and higher throughput, though its range is shorter. Disconnect other devices from Wi-Fi during important calls. Consider a Wi-Fi 6 router if your current router is more than a few years old.

Bypass Your VPN During Teams Meetings

VPNs add an extra layer of encryption and route your traffic through a remote server. This increases latency and can significantly reduce available bandwidth for real time media like video calls. Microsoft specifically recommends bypassing VPNs for Teams traffic.

Many corporate VPNs are not designed or configured to handle real time media streams. They introduce additional hops between your device and Microsoft’s servers, increasing the chance of packet loss and jitter. The result is frozen video, choppy audio, and laggy screen sharing.

Ask your IT department about split tunnel VPN configuration. Split tunneling allows Teams traffic to go directly to Microsoft’s servers while other traffic still routes through the VPN. This gives you the security benefits of the VPN for sensitive work while keeping your Teams calls fast and smooth.

If you manage your own VPN, disconnect it before joining a Teams meeting as a quick test. If video quality improves immediately, the VPN is contributing to the problem. You can reconnect it after the call or set up split tunneling rules for Microsoft 365 endpoints.

Lower the Video Resolution in Teams Settings

If you have tried other fixes and still experience freezing, reducing the video resolution can help. A lower resolution requires less bandwidth and processing power, leaving more resources for screen sharing.

Open Teams and go to Settings, then Devices or Video settings depending on your version. Look for options related to video quality or resolution. Some versions let you set a maximum resolution for outgoing video. Setting this to 720p or 480p instead of 1080p can reduce freezing significantly.

During a meeting, you can also turn off your camera temporarily while screen sharing. This eliminates the competing video stream entirely and gives all available bandwidth to the screen share. Many professionals do this during presentations and demos when the focus should be on the shared content anyway.

Another option is to ask meeting participants to turn off their incoming video. Each incoming video feed consumes bandwidth. In a meeting with 15 people all sharing video, disabling incoming video can free up several megabits of bandwidth. Go to the meeting controls and look for the option to turn off incoming video.

Run a System File Check on Windows

Corrupted system files can cause Teams to behave unpredictably. The System File Checker (SFC) tool built into Windows scans for and repairs corrupted system files that might be affecting Teams performance.

Open Command Prompt as Administrator. Type sfc /scannow and press Enter. The scan takes several minutes to complete. It will check all protected system files and replace corrupted files with cached copies from a compressed folder.

If SFC finds and fixes corrupted files, restart your computer and test Teams again. Users in Microsoft’s community forums have reported that this single step resolved their Teams freezing issue after nothing else worked.

You can also run DISM (Deployment Image Servicing and Management) before SFC for a more thorough repair. Open Command Prompt as Administrator and type DISM /Online /Cleanup-Image /RestoreHealth. Let it finish, then run the SFC scan. This two step process repairs the Windows image first, then uses the repaired image to fix any remaining corrupted files.

Reinstall Microsoft Teams Completely

If none of the above solutions work, a clean reinstall gives Teams a completely fresh start. This removes all cached data, corrupted files, and broken configurations at once.

First, uninstall Teams. On Windows, go to Settings, then Apps, then Installed apps. Find Microsoft Teams and uninstall it. On Mac, drag the Teams app from the Applications folder to the Trash.

Second, delete leftover files. On Windows, open the Run dialog (Windows Key + R) and go to %appdata%\Microsoft\Teams for Classic Teams or %userprofile%\appdata\local\Packages\MSTeams_8wekyb3d8bbwe for New Teams. Delete everything in these folders. On Mac, run the Terminal commands mentioned in the cache clearing section above.

Third, restart your computer. This clears any lingering processes from memory.

Fourth, download and install Teams fresh from the official Microsoft website. Sign in with your account and test a call with screen sharing. A clean install resolves deep seated issues that cache clearing and settings changes cannot fix.

If you previously had both Classic Teams and New Teams installed, install only one version. Running both versions simultaneously has been known to cause conflicts and freezing.

Monitor Call Health During Meetings

Teams has a built in diagnostic tool that shows you real time performance data during calls. The Call Health feature displays frame rate, resolution, bandwidth, and latency for both your video and screen sharing streams.

To access it during a meeting, click the More menu (the three dots). Select Settings, then Call health. Scroll to the Screen Sharing section to see the current frame rate and resolution of your shared content.

If the frame rate is below 7 fps during screen sharing, you are experiencing the low motion default mentioned earlier. If the bitrate is low, bandwidth is the issue. If latency is above 100ms, network routing or VPN could be the problem.

Use this data to identify exactly what is causing your video to freeze. Instead of guessing, you can see whether the problem is bandwidth, frame rate, resolution, or latency. This makes troubleshooting much faster and more precise. Check call health at the start of every important meeting to catch problems before they affect your presentation.

Contact Your IT Admin for Network Level Fixes

Some causes of Teams video freezing exist at the network level, beyond what you can fix on your own computer. Firewalls, proxy servers, and network configurations managed by your company’s IT department can block or slow down Teams media traffic.

Microsoft Teams requires specific ports and IP ranges to be open for optimal performance. If your company’s firewall blocks UDP traffic or forces all media through a proxy server, video quality will suffer. UDP is the preferred protocol for real time media in Teams, and blocking it forces a fallback to TCP, which adds latency.

Ask your IT team to verify that Teams traffic is not being routed through a web proxy. Request that they check QoS (Quality of Service) settings to prioritize Teams media packets. Suggest they review Microsoft’s published network requirements and compare them against your organization’s current configuration.

For organizations with persistent Teams quality issues, Microsoft offers the Call Quality Dashboard (CQD) in the Teams admin center. This tool provides aggregate data on call quality across the entire organization and helps IT teams identify network problems affecting multiple users.

Frequently Asked Questions

Why does my Teams video freeze but audio keeps working?

Teams prioritizes audio over video when resources are limited. Audio requires far less bandwidth and processing power than video. When your bandwidth drops or CPU usage spikes, Teams will keep audio running smoothly and reduce or freeze the video stream. This is intentional behavior designed to keep communication flowing even under poor conditions.

Does screen sharing in Teams use more bandwidth than a regular video call?

Yes. A regular one on one video call at recommended quality uses about 1.5 Mbps. Adding screen sharing on top of that increases the requirement. For meetings with screen sharing, Microsoft recommends 2.5 Mbps upload and 4 Mbps download for the best experience. High motion screen sharing uses even more.

Will turning off my camera fix the freezing during screen share?

In many cases, yes. Turning off your camera eliminates one of the two competing video streams. All available bandwidth and processing power then go to the screen share. This is a quick workaround for situations where you need smooth screen sharing and your connection or hardware cannot handle both streams at once.

How do I know if my Teams version is outdated?

Open Teams and click your profile picture. Select About Teams or Check for updates. Teams will show your current version number and check for available updates. If you are more than one or two versions behind the latest release, update immediately. Outdated versions often contain known bugs that have been fixed in newer builds.

Can my company’s VPN cause Teams video to freeze?

Absolutely. VPNs add extra latency and can reduce available bandwidth for real time media. Microsoft recommends using split tunnel VPN configurations that allow Teams traffic to bypass the VPN and connect directly to Microsoft’s servers. If you notice that video freezing only happens when your VPN is connected, the VPN is very likely the cause.

What is the Optimize for Video button in Teams screen sharing?

This is a newer feature in the Teams presenter toolbar. When you share your screen, the floating toolbar includes an Optimize button with a video icon. Clicking it tells Teams to increase the frame rate for your shared content, which is ideal for sharing videos, animations, or any high motion content. It may slightly reduce resolution to accommodate the higher frame rate.