Since this started after KB5065426, first try installing the latest Windows updates from Settings > Windows Update > Check for updates and restart the PC. Microsoft documented a network-share issue after the September 2025 update, and it was addressed in a later update, so updating may be safer than removing a security update.
If you still need to uninstall it, try this first:
- Go to Settings > Windows Update > Update history > Uninstall updates.
- Look for KB5065426 or the most recent Quality Update.
- Select it and choose Uninstall, then restart.