I just did a clean install of Windows 7 from a legitimate copy of Windows 7 professional (obtained on academic license through MSDNAA). However, it is running unbelievably slow. It works, but whenever I launch an application or really do anything, it sits and waits for at least 10 minutes. The HDD light isn't on, and it doesn't really look like it is doing anything at all.
Pentium D 805 2.66GHz
2 GB DDR2 RAM
MSI motherboard w/ ATI Xpress 200 chipset
Saphire Radeon X1550 256MB Graphics Card
Pinnacle Systems Firewire card
1 40GB IDE HDD (used as system drive)
1 250GB SATA HDD