Morning Overview on MSN
New zero-day bug can silently block Windows Defender’s virus updates
A researcher who calls himself Nightmare Eclipse published a free tool on September 19, 2026, that can quietly stop Windows ...
On some PCs, Windows 11 has been incorrectly warning that Microsoft Defender is turned off, even when it isn't, for almost ...
Serial Microsoft zero-day leaker NightmareEclipse has found another way to mess with Windows Defender, this time by stopping ...
Microsoft has resolved a bug that caused Windows Defender to crash after a recent security update, resulting in 0xc0000005 access violation errors on some affected systems. Microsoft Defender is a ...
After installing the latest Defender Antivirus update for Windows 11, users have started reporting that their operating system is sending notifications stating "Microsoft Defender Antivirus is turned ...
Microsoft has acknowledged that updates caused problems, and now the last known issues are said to be resolved.
BigDiskBuster can block Microsoft Defender updates by filling disk space, leaving detection content stale; no patch or advisory exists.
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