OSTot PC Speed supports Windows 10, 8.1, 8, 7, XP, Vista. It can do much more than you think. *One-click health check: Check your computer health status & boost it with one click. *Complete cleanup: Clean up PC junk files, including system junks files, invalid registry information, cookies, traces, plugins, etc. *Smart speed up: Faster PC performance by optimizing memory, system resources *Useful toolbox *Customizable options