I worked and worked on removing a redirect virus on SWMBO's computer. Thought I had it a couple of times, but it continued to be slow and would send her to all sorts of places she didn't want to go. I finally gave up and did system refresh which is a new feature of Windows 8. It worked great. It put back the OS like it came from the store, but did not delete her data. I had her back up like on a brand new PC in no time (Well, it took several hours, but it was much less time than I had spent trying to get rid of that stupid virus!)
Say what you will about Windows 8, but it has some nice features, that are not related to those stupid tiles. Some of the backup and restore features are really pretty nice.