I just recently decided to go from 32-bit Windows XP Pro (I miss it!) to 64-bit Windows 7 Ultimate. All of my hardware is the same. Obviously, no so for my drivers as I now have a 64-bit OS. My hardware setup is as follows:
I had been running 32-bit XP Pro on this box for close to 4 years now, I think, with no problems at all. My friends finally convinced me to 'downgrade' to Windows 7. It was DX10 that sold me on it. Once I get everything set up and all my drivers installed I noticed something strange; when certain actions are being performed (mainly during program installations) close to every other open program stops responding until the action is complete.
I.E. I can run Mass Effect 2 just fine, and that's a pretty hardware-intensive program. However, the second I start to install MS Office I can't even use Firefox because it has stopped responding and I can't bring up Task Manager.
I am leaning towards this being one of two things:
1. A driver problem with something I just can't think of. I've reinstalled most.
2. A power supply problem. That would be strange, as this same setup has run fine in the past. Does Windows 7 somehow draw more power than XP? Does running x64 use more than x86?
I would think that your main issue here is that you have only 2 GB RAM on a 64 bit Win 7 set up. 64 Bit takes more resources than 32 bit. The minimum specs for 32 bit Win 7 is 1 GB RAM while 64 bit requires 2 GB at the very least. The recommended specs are 4 GB RAM for 64 bit Windows. 64 bit Win 7 finds its sweet spot at 4 GB RAM. The RAM you have has no head room for SuperFetch and intense operations such as installs will have your system reaching for that Pagefile a great deal. Those Internal HDD's you have listed are going to be slow and when they are being accessed it is going to cut the legs right out from under your system leaving you no room for multi tasking at all.
Advice: Double your RAM. Install the 1.5 Tera drive as the main drive as it will be the fastest of the bunch and leaves a great deal of room for Windows to work with thus more speed.
Any issues i had with WIN 7 " not responding" ended up being memory related upon further investigation.
I found my specific problem was a bad stick of ram.
Ran Memtest86+ removed the bad ram = no more issues.