I recently bought Windows 7 Home Premuim x64 for my gaming PC. I installed Ubuntu 13.04 so I could use my PC for schoolwork and surfing the internet. I was wondering can I uninstall Ubuntu without dual booting Win7 and ubuntu? I bought the disk copy. Is there a disk that comes with Win7 that can wipe my HDD? I do not want to dual boot, I only want Win7 on my PC. Please help?