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Windows 7: Need to delete locked system files from old windows install

21 Jan 2012   #1

Windows 7 Professional 64-bit
Need to delete locked system files from old windows install


I have recently updated my hdd with a clean windows 7 install, but had the old one on a secondary hard disk as a back up. I now need to delete these files to save space on my data drive, but am unable to delete the system and windows files as they are owned by TrustedInstaller.

I discovered how to take ownership of these directories, but now the UAC is telling me that I need permission from myself to delete the files which I own!

Is there anyway to get round this without shipping out my data and doing a format, which I don't want to do as I always seem to miss something important...


My System SpecsSystem Spec
21 Jan 2012   #2

Windows 10 Pro/ Windows 10 Pro Insider

See if this tutorial will help. how to delete windows.old You must be the administrator to do this.
My System SpecsSystem Spec

 Need to delete locked system files from old windows install

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