2 weeks ago

Windows 11 Security Scans Crash After Defender Updates

Some Windows 11 computers are having trouble checking for viruses.

Their Windows Defender full and quick scans may close or crash soon after they begin.

Offline scans may also stop before finishing.

The latest Microsoft Safety Scanner may have a similar problem.

The exact cause is not known.

Reports suggest that certain Microsoft Security Intelligence updates may be connected to the issue.

Some users say updating to version 1.457.236.0 fixes the problem.

Microsoft has not officially commented, so users can try updating, reverting the update, or scanning specific folders instead.

Key facts

Affected scans: Full, quick, and offline Windows Defender scans
Offline scan progress: Some users report scans stopping around 90–93%.
Potentially affected Defender versions: Versions 1.1.26070.7 and 1.1.26080.2
Reportedly affected intelligence updates: Versions 1.457.222.0, 1.457.225.0, 1.457.226.0, 1.457.227.0, and 1.457.230.0
Reported fix: Updating to Security Intelligence Update version 1.457.236.0 may resolve the issue.
Alternative workaround: Reverting to an older intelligence update or scanning individual folders and drives may help.
Official response: Microsoft has not officially reacted to the reported issue.

firstpost.com · 2 weeks ago