Microsoft's Windows 11 23H2 update (KB5044285) has introduced several critical bugs affecting SSH functionality and File Explorer performance, frustrating enterprise users and IT administrators alike. While the update promised security enhancements and quality improvements, early adopters are reporting significant workflow disruptions that Microsoft has yet to fully address.

The SSH Authentication Nightmare

The most severe issue affects Windows' built-in SSH client, with users reporting:

  • Failed authentication attempts: Many systems reject valid SSH keys that worked perfectly before the update
  • Connection timeouts: Sessions dropping unexpectedly during file transfers or remote commands
  • GSSAPI problems: Kerberos authentication failing for domain-joined machines

Microsoft's documentation acknowledges "some authentication scenarios" may fail but provides no workaround beyond suggesting users revert to older versions - an unacceptable solution for managed enterprise environments.

File Explorer's New Quirks

Beyond SSH problems, the 23H2 update has introduced several File Explorer annoyances:

  1. Context menu lag: Right-click responses delayed by 2-3 seconds
  2. Preview pane failures: Thumbnails not generating for common image formats
  3. Search indexing issues: Recent files not appearing in Quick Access
  4. Network drive disconnects: Mapped drives showing as unavailable despite active connections

Known Workarounds (While We Wait for Fixes)

For SSH issues:
- Temporarily switch to third-party clients like PuTTY
- Disable newer security protocols in ssh_config
- Manually specify older key exchange algorithms

For File Explorer:
- Restart the Windows Explorer process
- Rebuild the search index manually
- Disable preview pane functionality

Microsoft's Response Timeline

As of this writing, Microsoft has:

  • Acknowledged the SSH issues in KB5044285 release notes
  • Promised a fix in the next cumulative update (expected late October)
  • Not officially commented on the File Explorer problems

Enterprise administrators should weigh the security benefits against these operational disruptions before deploying this update across their organizations.