This killed Windows 10! I downloaded and installed and after running it, And making sure to turn off registry optimization, my system became extremely unstable. My start menu kept opening up, my keyboard wouldn’t work correctly. I couldn’t even type anything! Typing a letter wouldn’t make it appear in a url box, text editor..whatever. Instead it would bring up random options and menu choices. Thankfully I had a system restore point that I could go back to, but it was a ways back and it cost me about an hour off my machine. I can’t really recommend this if you have the latest version of Windows.