Media Centre crashes when accessing the TV Guide

Running Windows 7 Home Premium 32 bit.
Recently WMC started crashing whenever I opened the TV Guide. In all other eepects WMC is functioning perfectly. I have made no changes to the system - no knew hardware and no new software. No outstanding Windows updates.
I tried installing the "Cumulative Update for Windows Media Center in Windows 7 (Windows6.1-KB981078-x86.msu)" but it shows the message "This update is not applicable to your computer ".
Any ideas out there?

 

Did you try using Windows' "System Restore" to roll Windows back to a previous state when your computer was functioning correctly?

Microsoft.com > System Restore > Windows 7​

Sometimes, unexpected changes to your computer can cause Windows to behave unpredictably. System Restore helps you restore your computer's system files to an earlier point in time. It's a way to undo system changes without affecting your personal files, such as e-mail, documents, or photos.

 

Thanks - I should have said I had done a system restore (which changed nothing).