My lenovo laptop randomly reboot windows when start to share screen using Microsoft Teams for meeting.

Thank you for providing the additional details, @Mohd Azril Shafiq Mustaffa.

Since this behavior has been observed specifically on the Microsoft Teams desktop application and appears to affect users using the Lenovo ThinkPad E14, this may potentially be related to an interaction between the Teams desktop client, the system graphics driver, or hardware acceleration components. 

Based on experience with similar cases, screen sharing can place a sudden additional load on the GPU, and in certain hardware‑and‑driver combinations, this has occasionally been observed to contribute to system‑level instability, including unexpected reboots. That said, at this stage, this should be considered a working assumption rather than a confirmed root cause, and further technical investigation would be required to validate it. 

Please kindly note that, as a forum moderator, I don’t have the necessary tools or permissions to initiate remote diagnostics, collect system logs, or perform direct investigations on affected devices.

However, given that this issue is impacting all users across your organization, I fully understand how disruptive this can be to daily operations. For that reason, I would strongly recommend submitting a support ticket so the issue can be investigated more thoroughly and efficiently. You can follow the steps below to create a support request: 

• Sign in to your Microsoft 365 Admin Center. 
• From the left‑hand navigation pane, scroll down and select Help & Support. 

• In the search box, enter a keyword such as “reboot Windows when sharing screen in Teams”, then click the blue arrow (or “Geth help” button) to search. Once the Contact Support option appears, select it. 

• Choose your preferred contact method and clearly describe that the issue affects all users, the device model being used, confirmation that Windows is on the latest version, and the troubleshooting steps already attempted. 

Note: If you are an end- user, please contact your IT admin to follow these steps.   

Once the ticket is opened, a Microsoft support engineer can conduct a remote troubleshooting session to investigate the situation in detail, review backend configurations, and run any necessary diagnostic or synchronization tools. If required, the case can be escalated to a specialized engineering team for deeper analysis. 

While I’m not able to intervene directly, guiding you to the appropriate support team is the most effective assistance I can provide within my scope. I do hope this helps move the investigation forward quickly so your organization can return to working smoothly. 

Thank you for your understanding! 

Hi @Mohd Azril Shafiq Mustaffa, 

Thank you for posting your question in the Microsoft Q&A forum. I appreciate you taking the time to share the details of the issue you’re experiencing. To better understand the scenario and help narrow down the root cause, I’d like to clarify a few points with you: 

• Could you please help confirm if this behavior is affecting multiple users in your organization, and whether all of the impacted devices are Lenovo laptops? 
• May I also check whether the affected devices are currently running the latest Windows updates? 
• Additionally, it would be helpful if you could test joining a meeting via Microsoft Teams on the web and attempt to share the screen from there. Please let us know if the same unexpected reboot still occurs in that scenario. 

These details will help me gain a better understanding of the issue and allow me to conduct further research to identify potential troubleshooting steps or, if necessary, guide you toward the specialized support teams for deeper investigation. 

Please feel free to reply under this post with the requested information or let me know if there are any updates on your end. I’ll be more than happy to continue assisting you from there. 

Thank you, and I look forward to your response. 

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The issue of your Lenovo laptop randomly rebooting when starting to share the screen in Microsoft Teams could be related to several factors. Here are a few troubleshooting steps you can consider:

1. Check System Requirements: Ensure that the laptop meets the minimum system requirements for running Microsoft Teams, especially for screen sharing. An unsupported operating system or hardware can lead to instability.
2. Update Drivers: Make sure that all device drivers, particularly the graphics drivers, are up to date. Outdated drivers can cause conflicts when sharing screens.
3. Windows Updates: Ensure that Windows is fully updated. Sometimes, system updates include important fixes that can resolve unexpected behavior.
4. Check for Conflicting Software: Other applications running in the background may conflict with Teams. Try closing unnecessary applications before starting a meeting.
5. Event Viewer: Check the Windows Event Viewer for any critical errors or warnings that occur around the time of the reboot. This can provide clues about what might be causing the issue.
6. Hardware Issues: If the problem persists, consider checking for hardware issues such as overheating or failing components, which can lead to unexpected reboots.

If none of these steps resolve the issue, it may be beneficial to contact Microsoft Support for further assistance, as they can provide more tailored troubleshooting.

References:

• Resolve Teams client launch failures
• Resolve issues when starting the new Teams app