Comments - Lysenko

You can always try burning yourself some kind of unix live CD and putting it in your computer and booting up that OS, and then using it to access your files. Ubuntu's live CDs are pretty hassle-free. The key is that you don't actually have to install the operating system in order to use it, so you can transfer the files you need onto an external.

ubuntu.com/desktop/get-ubuntu/download

Otherwise, you can get a new hard drive, install windows on that, and then plug in the old hard drive with the offending virus on it and try and transfer over important files without getting the virus onto your new install of windows.