|Try pressing the power-on button for one second to achieve normal shutdown. That's how I do it all the time, no need to use the shutdown menu at all, though it will depend on how you've got your power-on button configured in Control Panel > Power Options.|
As for the actual problem you're having, try running the System File Checker:
Start > Run
Type SFC /SCANNOW
Windows will check for and replace any missing or corrupted system files. You may be prompted to put your Windows disc in to the optical drive if a required file cannot be found on local storage.
message edited by phil22