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Recently I setup a backup for some folders. Today I found out that windows defender won't let the backup service do its job.

But how do I exclude the backup's shadow copy from windows defender?

It's not like I can point it to a file or folder and say "Don't check here".
Heck I tried excluding the entire backup drive, with no success.

And if I exclude .exes I might as well disable defender entirely.

  • "But how do I exclude the backup's shadow copy from windows defender?" Create an expection for the shadow volume copy location. This is safe because your not excluding the original location. You can also adjust the workflow scans happen well before a backup happens – Ramhound Jan 27 '17 at 23:22
  • This does not work. I guess it isn't very obvious the way I wrote it, but it is the very first thing I tried. – martixy Jan 27 '17 at 23:38
  • So what else have you tried but fail to mention? – Ramhound Jan 27 '17 at 23:43
  • Added the string "VSSVC" to excluded processes. Didn't work. Gave up, turned off Defender, ran backup manually. I'd like however, to not have to babysit it. – martixy Jan 27 '17 at 23:48
  • What exactly did you mean, when you said, "It's not like I can point it to a file or folder and say "Don't check here".". – Ramhound Jan 28 '17 at 0:08
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I'm not sure that excluding a volume shadow copy is actually what you need to do. I thought I was in the same boat as you... Windows Backup and Restore was reporting failed backups due to malware. The only references I could find in Windows Defender was to a path similar to Device\HarddiskVolumeShadowCopy5\Download\something.crx, and searching similar paths on my actual drives wasn't turning anything up.

My first clue was when I tried to redo the backup manually, I noticed the first step was "Create Shadow Volume." This made me think that Defender must not be so stupid after all, and perhaps it was catching something being copied from a source drive. After futher investigation, turns out some symbolic links (folder aliases) I had created was confusing the issue and I finally did turn up the reported file (downloaded over 5 years ago!) that it was complaining about. Now why full scans from Defender doesn't find it, but real time access during backup does, is a separate issue.

Likely you aren't as inept as me with locating the reported malware file(s), but maybe you do have a tenacious bad guy that is either having trouble being cleaned up, yet hiding itself well, or that keeps re-infecting the system from another vector.

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