|On another computer, go here and download the EXE fix|
Unzip it on the other computer and extract the reg file.
Put the reg file on a Flash Stick and then put it in the USB socket of
the ailing computer. You should be able to double click the reg file
on the stick and then OK all prompts to fix the issue.
As this is probably due to a virus (or its aftermath) it is worthwhile running scans as per the previous post.
Always pop back and let us know the outcome - thanks