Since I just got this PC recently (2-3 weeks ago), it came with 8.1. A few days ago when I got the BSOD it said I had to do a system restore. So I restored it to an earlier date. I installed Skype, Java, Chrome, Virtualbox, VLC, Camtasia Studio, Fraps, Xsplit, WinRAR, Audacity and Paint.net. For windows updates I had to reinstall 50 windows updates.