HITMAN-X-
Vista has the framework built in from the beginning, so thats not the problem.
To the rest of you,
As i said earlier I didn't have the problem before the install, but just after the install i got the error. I can't find the errors in the log (too long) so i can give you anymore details.
I dont know if is directly caused by Paint.Net but it did it indirectly, for sure...