There is a bit in that article about running scan reg, may be worth doing that but it appears that it wont be able to find it to repair it.
If you do try to run it and it cant, then it will confirm that it is a registry problem then we can think along those lines as to what action to take next
Edited to add :
To start the Windows Registry Checker tool, click Start, click Run, type scanregw.exe in the Open box, and then click OK.
Try that please and see if it will run or not, I suspect it will say it cant