I've built a new computer and installed a new copy of Windows 7. Although this desktop is way superior than the previous one in terms of hardware specs, the OS just completely freezes for about 15-30 seconds every few minutes, then the hard drive kicks in (I hear it working) and everything back to normal.
I'm running Windows 7 Ultimate (64-bit) with 8 GBs of DDR3 RAM and an Intel i7 processor. In theory it should run as smooth as silk, but it's not. The OS is completely encrypted with TrueCrypt, but not sure if that's the cause of the issue.
Note that during the freeze-ups the CPU level is very low and only 1.80 GB of memory is used.
How can I troubleshoot this kind of issue?