start fresh

Back up your data (all the files you want to keep) 2 ways, make sure you have copies of all your software, then format the hard disk & re-install Windows. Far easier than un-gunking your computer. Hopefully you have a friend, child, spouse, or far-removed cousin who can help you do that if you haven't done it before. Of course, you'll have to download a bunch of security stuff afterward, and you'll still need good antivirus and anti-spyware software. Tweet