Security News > 2024 > July > Windows 11 KB5040527 update fixes Windows Backup failures
Microsoft has released the optional KB5040527 preview cumulative update for Windows 11 23H2 and 22H2, which includes fixes for Windows Backup and upgrade failures.
The July 2024 non-security preview update fixes an issue that sometimes caused Windows backups to fail on devices with an Extensible Firmware Interface system partition.
KB5040527 fixes a Windows Defender Application Control memory leak that could lead to system memory exhaustion while provisioning Windows devices and a separate WDAC bug that triggers app failures when applying WDAC Application ID policies.
"You can install this preview update by clicking on 'Check for Updates" after going into Settings > Windows Update.
Microsoft fixes bug causing Windows Update automation issues.
Windows 11 KB5040442 update released with 31 fixes, changes.
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