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Windows is denying me permission to copy a dll from a mounted image. It says I need permission from all users to make any changes to the above mentioned file. Any suggestions?

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Try in safe mode or if u are an admin than go through that account. – avirk Jun 22 '11 at 7:59
Which dll? Where are you pasting it? Are you trying to replace an existing dll? Do you have administrator rights? – tumchaaditya Jul 18 '12 at 4:29
If nothing of the solutions below works, try an Ubuntu Live Image. – Vanadis Jun 10 '13 at 8:00
Does Windows deny reading the DLL to copy or does Windows deny writing the DLL to the location where you want to copy it? Are you overwriting an existing DLL? – Werner Henze Jul 12 '13 at 6:55

Try taking ownership of the file.

Have a look at this guide

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Try Unlocker.

If you've ever been unable to delete a file in Windows, and can't figure out what program's using it, Unlocker is the solution.

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