Hello, This sounds like the kind of error that you would get if .NET Framework 2.0 is damaged in some way. I've also seen suggestions (googling the 0xD0000135 error message) that this error can appear on a machine that has been attacked by a virus.
I'd try completely removing the .NET Framework 2.0 (use remove in the control panel manager), then putting it back again.
If you have difficulty removing and re-installing the .NET Framework this page may help:
http://support.microsoft.com/kb/908077
Another user who recently had difficulties starting the software up got their problems to go away with those instructions.