You say you can get into command prompt. Hopefully that's with admin privilege. Here is something you can try that can help fix damaged OS files, an internet connection is required. The following must be done exactly, with caps and spaces as shown. DISM spacebar /Online spacebar /cleanup-Image spacebar /CheckHealth Spacebar refers to hitting the spacebar once then entering the next command. This can take from a minute to several minutes to run, don't do anything, it will finish by itself. The next command is, DISM /Online /Cleanup-Image /ScanHealth I put the spaces in the same way the first command was done just minus the word spacebar . Again this can take a while, don't rush it. There is one more command to run, which could/should fix your problem. DISM /Online /Cleanup-Image /RestoreHealth This can and will take some time and you should see some type of progress bar. Whatever you do, make sure when leaving command prompt that you type exit and hit enter which will close the window. If the first command doesn't find anything, the other commands most likely won't do anything. If followed correctly, none of this will do any damage. If this doesn't work, you probably will have to do a re-install. If someone sees a problem with my suggestion, please do speak up with a correction. I have used these exact commands to repair my files in the past. I hope this helps.