If your Windows 10 computer isn't working properly, you may be able to fix it without losing any of your data. This can be done by performing a repair install of Windows 10. A repair install of Windows 10 will replace all of the system files on your computer without affecting your personal files or data. This can often fix problems with your computer, and is a good first step to try if you're having trouble. To do a repair install of Windows 10, you'll need to create installation media using either a USB flash drive or a DVD. You can then use this media to boot your computer and perform the repair install. Keep in mind that a repair install of Windows 10 should only be used as a last resort. If your computer is still having problems after you've tried this, you may need to perform a clean install of Windows 10. This will erase all of the data on your hard drive, so be sure to back up your important files before proceeding.