Hello, The first thing to try is restarting (not shutdown as shutdown only hibernates by default). If that does not work, you can try to open CMD as administrator and run "sfc /scannow" - without quotes.
If you cannot open CMD, go to the power options and while holding shift, click restart. It will bring you to a menu where you have to press troubleshoot, advanced options, then startup settings (not repair) it may be on a second page. When you computer restarts hit 4 on the options page to boot into safe mode. From there, open cmd as administrator and run the "sfc /scannow" command again.
If this does not work, restart your pc and it will go into normal mode again, from there go to the power options and while holding shift, click restart. It will bring you to a menu where you have to press troubleshoot, advanced options, and then command prompt. Once you are there, run this command: "chkdsk /f /r /x" (again, without quotes)
Reply if this fixes it or if you have trouble.