Virus & Threat protection are disabled after windows Update April 14, 2020—KB4549951

After I have installed the Windows Update April 14 2020 - KB4549551.    My virus threat protection is disabled and when I  go into the security settings it scans like its enabling and wont activate.    Im also uable to change my fonts  in emails or in Microsoft Office & web sites.


Microsoft has just released new Antivirus/Antispyware definition whose version is 1.313.1687.0 that fixes the issue.

Windows 10 users can check what version of Windows Defender is being used by checking this guide.

Users can manually update the Windows Defender definitions by going to Windows Security > Virus & threat protection and then clicking on the 'Check for updates' link.


If not available in Windows Security go to Settings > Update & Security > Check for updates.


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Question Info

Last updated May 21, 2021 Views 4,636 Applies to: