A few years ago, I bought a gaming machine from TigerDirect. It was their System-max brand. It came with Windows 7 Pro preinstalled and worked pretty well. When Microsoft offered the Windows 10 upgrade for free, although reluctant to leave Windows 7, I upgraded the system. After a while I realized that I should have done a fresh install, but that would've expended about $150 for the Pro version. The computer now has Windows 10 Pro installed, but some of the programs are acting a bit flaky. I tried to back up the image to Acronis, but for some reason I could not access the bios to make the bootable CD of Acronis the boot drive. Non-access to the bios may not be a related issue. Very frustrating. Since I was unable to create an image backup, I just copied the files that I needed individually to another hard drive. My idea was to somehow reinstall Windows 10 and then just add the files that I had saved to the other drive to that system. Somebody told me that there was a way to reset the computer, so that it would eliminate everything on the drive, except for the operating system. I tried calling Microsoft tech support, but they were totally useless, recommending that I go back to the manufacturer for advice. They also said that I could reinstall Windows 7 Pro if I had the original key codes. This code is on the case, and I guess I could do that, but I don't know if I have the key codes for the Windows 10 upgrade that was provided by Microsoft. I am looking to see if I have those key codes, but quite frankly I have a lot of computers, and I don't know if the key code for that particular computer is available. I do know that Microsoft will not provide that keycode without a lot of bureaucratic problems. Does anyone know if there is an easier way to get rid of all the programs on the machine, clear out the registry to a default state, and then reinstall the programs that I need? I guess I could also uninstall all of the products on that machine, but that would be really time-consuming and wasteful. I'm open to any and all reasonable suggestions on how to resolve this issue. Points will be awarded for helpful suggestions. If information on the hardware is needed, I can provide that. Thanks.