Windows 11 24H2 transferring large files = Network lost.

Title: Troubleshooting Windows 11 24H2 Network Interruptions During Large File Transfers

If you’ve recently encountered network disconnections while transferring large files on Windows 11 24H2, you’re not alone. Many users have reported experiencing brief network outages—lasting from one to five minutes—specifically during the transfer of sizable data sets, typically exceeding 40 gigabytes. This issue can be particularly frustrating, especially when it appears to be linked to system updates or hardware configurations.

Understanding the Problem

The core of the problem involves the network connection dropping intermittently during large file transfers. Notably, while the network becomes inaccessible for internet browsing or network sharing, it’s still possible to ping the other PC’s IP address—indicating that at least some local network communication remains functional. This suggests a temporary disruption in network stability rather than complete loss of hardware connectivity.

Potential Causes and Factors

1. Recent Windows Update:
   The issue may be associated with recent cumulative updates, such as KB5063878. Some users have observed that this update correlates with network stability problems. If you notice a decline in network performance following a specific Windows update, it’s worth considering its role.

2. Hardware Considerations:
   In scenarios where a mechanical HDD (e.g., Seagate Barracuda 7200 RPM) is used for large file transfers, there might be interactions between the drive and system components that exacerbate network issues. While SSDs are generally less problematic, HDDs can introduce bottlenecks during intensive data transfers.

3. Network Equipment and Configuration:
   Your network setup, including the Ubiquiti Dream Machine Pro router and enabled Vans, appears stable. However, firmware or configuration issues on the router or network interfaces can sometimes cause intermittent connectivity during high bandwidth activities.

Troubleshooting Steps and Recommendations

1. Update Network Drivers:
   Ensure all network adapter drivers are up to date. Check the manufacturer’s website or your motherboard’s support page for the latest drivers compatible with Windows 11 24H2.

2. Monitor Network and System Logs:
   Use Event Viewer or Resource Monitor to track any error messages or warnings that coincide with disconnections. This can provide clues whether the issue is driver-related, hardware, or software.

3. Test with Different Files and Transfers:
   Try transferring files to different destinations or with varying sizes to see if the problem persists universally or only under specific conditions.

4. **Disable