Code 0x80240022" Windows Defender won't update.

  • Thread starter Thread starter Guest
  • Start date Start date
I haven't seen this one on Vista. Here's something to try, though:

You may need to run the cmd prompt with Administrator privileges--so right
click and elevate to a command prompt. cd to:

\program files\windows defender

Then:

mpcmdrun -RemoveDefinitions -All
mpcmdrun -SignatureUpdate

See if that takes care of it.
 

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