When I click on 'My Computer' nothing happens. This is true whether I use the icon on the desktop, or use the 'Start' Menu. It is also true for other 'Windows' functions, like Control Panel and Search, accessed through the Start Menu. Also, Explorer gets a 'not responding' error, unless I run it with add-ons disabled.
All other programs run normally, and I can access all my files through them. I ran Disk Cleanup and nothing was found. I have run a spyware scan with Windows Defender and nothing was found. I have started to run the sfc /scannow utility, but got asked for Windows CD for SP3 but aborted the scan as I did not have this CD and didn't know what would happen.
All this is running on an HP laptop, dv6000.