how big is the problem?
what mesher did you use?
What type of analysis?
Is it a mixed mesh? What element types?
What version are you using?
Some relevant info would is helpful when you are asking for free help.
It seems that SW is using only one core (or something like this) making true the information that it doesn't take any advantage os multiple processor/core systems....
If you have your problems set up correctly it works fine but it only uses multiple cores for invertingthe stiffness matrix. If your problem involves a lot of contact interations that are not converging because the problem isn't set up right then it will look like it doesn't use them. Ihave been doing this sort of thing with this tool for over 10 years - it does use them.
I totally agree with Bill. When you are dealing with contact analysis and your process gets stuck means you didn't set up correctly the study.
I have the same hardware you do and I believe that your mesher isnt using all of your CPU on one core (seems only half) is that vista uses superfetch and fills your ram up. I believe that the mesher is doing so much that it can't dump the ram and then fill it back up. When you are looking at your performance look at the amount of free ram and cached. If you have no free ram then it must dump the cached ram and then use that newly empty RAM. I have turned off superfetch on my machine and told windows to clear the ram everytime I shut down. It takes a while to shutdown (15 min or so) but i get a clean slate when I reboot. Hope this helps, it did for me.
My other post may have missed the mesher part of the original post - the mesher does only use a single core - at least up to 2010.