Hello, im really hoping i can get some help asap.

My pc has recently been coming up with errors, most noticeably something about the media file errors etc.

I was wondering if there was a free website/programme out there where it will go through my pc looking for missing files/errors and then fix them?

Or alternatively..

I tried just wiping my pc but when trying to delete the paticipation thing it says there are files on there that are needed so i was wondering how i get round this but without just creating a new one which would take up more memory..