One of the drivers for my mouse (hidusb.sys) corrupted.

I replaced it with a copy from a machine with the same operating system but Windows won't use the driver because its not digitally signed.
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I'm her next door neighbor. She can't afford to have the computer fixed in a shop so she asked if I would take a look at it for her.

Normally her issues are simple but this one has been far more...

First my apologies for not providing a log file with my post.

I'm unable to run the tool that is provided in the Posting Instructions thread on the affected machine, because I can't get it to...