Waitasec. You changed from an AMD to an Intel chipset?
You don't have
to reinstall your OS, as you can install the new drivers, and then hunt and peck find them by using the command set devmgr_show_nonpresent_devices=1 and running devmgmt.msc to remove legacy stuff. I'd strongly recommend doing a reinstall though as windows is indeed quirky.
Out of curiosity, what does your BIOS say on the CPU details page? I probably should have asked that before scaring you with the term "bent pins". Your BIOS will be independent of any drivers that are needed to run windows, and would tell you if it is seeing the correct amount of cores/threads. That at least would help you to know if it is indeed hardware or software related.
Edit: Thought I'd show a screen capture of what I'm talking about.
As you can see in my BIOS, it shows 4 cores with HT "Not Supported". I realize that we will have different BIOS screens, but I'm pretty sure it should have a similar page.Edited by HAF_wit - 5/15/11 at 3:05am