yes you are right also try and run system scan and here is a microsoft site for help http://www.microsoft.com/athome/troubleshoot101.aspx
to open elevated cmd prompt >
1) press windows key + r (on keyboard)
2) type cmd in box and press enter
3) copy and paste > sfc/scannow next to c:Users\******> (*your user name see png pic) and then press enter on keyboard.
4) let windows scan the file system if it finds errors it will correct and let you no in the cmd window.