Had a customer try to return her computer because of 'viruses'. She said that Malwarebytes was a pos since she was forced to pay for it and didn't get anything in return. I scanned her system with the Avira rescue disk and then with Avira. Nothing found, However, none of her programs work. they all ask which program to open them with. I'm at a loss. I've tried every configuration thing I know of, default program, associations, etc, nothing works. Oh, somehow she managed to partially install an old version of Macafee. I can't uninstall it. Any ideas?