Windows defender will not update or turn on - Microsoft Community


will not update or turn on

original title: windows defender

***post moved moderator appropriate forum category.***

russ,

this system file damage or corruption.

use system file checker tool repair missing or corrupted system files

<https://support.microsoft.com/en-us/kb/929833>>

after running repair, reboot & test.

pləase let know if did or didn't resolve problem.

`~`



Windows / Windows 10 / Performance & system failures / PC



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