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defrag.exe: tracking an already in progress operation can be done from non-admin session

Posted by jpluimers on 2017/03/17

When you want to defrag.exe (the built-in Windows one, not the SysInternals Windows NT4 one, so make sure SysInternals comes last in your path) a volume, you have to run it with an elevated UAC Admin token.

But I just found out that you can do this without an Admin token:

C:\Windows\System32>Defrag.exe C: /t /v /u
Microsoft Drive Optimizer
Copyright (c) 2013 Microsoft Corp.

Tracking operation on (C:)...


Performing pass 2:
        Free Space Consolidation:  31% complete...

This makes it much easier to separate monitoring scripting from execution.

–jeroen

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