PSA Latest Windows Defender Definition Causing Issues 1.289.1521.0

[Redbatman89]

So today my system did a scan while I was away and was giving me the "Your PC cant be scanned error." So I typed in the defention on Google and this came up.

Windows 7, 8, 8.1 Windows Defender und Security Essentials mit Problemen (19.03.) [Update] | Deskmodder.de
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Basically this will keep happening till new definitions come out so it's Microsoft's end, not yours.

 

[wither 2]

Here's one possible solution-

Windows Defender - Your PC couldn't be scanned 0x8050800d - Microsoft Community

It it applies. here's another-

Windows Defender: Your PC Could Not Be Scanned. - Microsoft Community

Both are from 2016.