Windows 10 updates causing a bunch of issues again

It's becoming an all too common subject, after Microsoft's Patch Tuesdays far too often we see reports popping up about significant bugs. This time it happened again, the new mandatory KB5001330 and KB5001337 cumulative updates for Windows 10 seem to be causing a bunch of issues for at least a select group of users.

Bleeping Computer writes the patches are resulting in DNS resolution issues that prevent access to shared folders on servers when a user tries to access the folder by the server's name. This problem seems to occur primarily on systems with disabled multicase name resolution (LLMNR):

After users began reporting the issue on BleepingComputer's forum, users determined that many affected users are using the Dentrix Dental Practice Management software in their offices.

A longstanding support recommendation for Dentrix customers to reduce network lag has been to disable multicase name resolution (LLMNR) on Windows workstations. This is done by enabling the 'Turn off multicast name resolution' group policy under Computer Configuration > Administrative Templates > Network > DNS Client. -- Bleeping Computer

Gaming problems too

Beta News writes the patches are also linked to video gaming issues. Reported issues include game crashes, performance issues, error messages, screen flickering, etc. Some Windows 10 users are also seen the screen flicker issue when resizing Edge or Chrome browser windows.

As reported by Ghacks, many complaints can be found online in Microsoft's support forum and message boards, with Windows 10 users reporting various problems following the installation of the update. Some people have been plagued by bootloops and error code 0xc000021a after installing KB5001330, while others have encountered problems and error code 0x800f0984 when trying to install the update itself.

As is typical, these issues don't occur in every system. Often, it's a combination of certain hardware and driver versions that contribute to at least some of the bugs. Some affected users were able to resolve issues by updating to a newer graphics driver, or rolling back to an earlier version.

NVIDIA links KB5000842 to performance issues

On a related note, NVIDIA posted a couple of days ago that KB5000842, a Windows 10 update that got pushed out in March, is also linked to performance issues in video games. The green team recommends rolling back Windows 10 update KB5000842 if you're suddenly seeing performance problems after the installation of this patch.