I should have known you was not using XP, I did not even look at the forum that you posted to
Lets determine if the screen saver is causing the lock-up. I am not saying that it is the cause, I just want to go through a process of elimination. Turn your screen saver off for now. Turn off the monitor, and wait for a couple of hours or so. Come back to the computer, turn the monitor back on, and see if it is locked up.
If you want to wait overnight for that step, then you can try a few other things before it.
Turn on your computer with your internet connection removed. Run your screen saver just like you did before and see it you still get a lock-up. The easiest way to prevent you having to go through configurations again for the internet, is to plug it back in before your turn your computer back on.
You may have some malware running on your computer. Take a look at this site's tutorial on Spyware, found
here. The link also has d/l for the program that it is referring to.
After you have installed that program, and you find that you still have some problems, I would recommend that you post a Hi Jack This log. The tutorial on this site makes for a very interesting read, but changes should only be made by someone who knows what they are doing with it.
Hi Jack This tutorial The link also includes the d/l of the program and how to post it to the board.