I keep getting an error message, "Unable to launch restart.exe". This error wipes out the program files. If you are in a simple game, you can continue, if you are doing anything else, you are 'locked up'. The only solution is to 'shut down'. IT WILL LET YOU do this, but nothing else.
I have looked for the file restart.exe, but it is not on my laptop.
I'm not sure if it is a quirk of some software or a virus.