Hello, run these 2 if needed to get them back.
Pease download the following program to your desktop:Unhide.exe
Once the program has been downloaded, double-click on the Unhide.exe icon on your desktop and allow the program to run. This program will remove the +H, or hidden, attribute from all the files on your hard drives. If there are any files that were purposely hidden by you, you will need to hide them again after this tool is run.
Run SFC,System File Checker