Overview
- The company advises affected users to use webmail, move PST files out of OneDrive, or uninstall KB5074109 despite the security risks of removing the update.
- Microsoft also warns that multiple apps can hang when opening or saving files to cloud-backed storage such as OneDrive or Dropbox across Windows 11, Windows 10, and Windows Server.
- Emergency out-of-band fixes are already available for Remote Desktop credential prompt failures and for shutdown or hibernate problems on Secure Launch systems.
- Reports still under investigation include S3 sleep failures on some PCs, File Explorer desktop.ini quirks, Citrix Director shadowing errors, Hyper-V reboot hangs, black screens, and input device glitches.
- KB5074109 is a mandatory security update that auto-installed for many devices, and Microsoft has signaled further fixes could arrive with the next cumulative release targeted for February 10.