My goodness that's a lot of stuff. I don't barely recognize any of it. Right now there are 55 processes.
Sort them by the 'CPU' column and see if anything is eating CPU time. There should be one called 'System Idle Processes' that sits at 99, and the rest should flit between 00 and 01 when the system is standing idle (i.e. no programs open).
As far as the hard drive running alot. How ofton is alot? It certainly is slow when I do hear it though.
Constantly, or in long bursts of continuous activity. Also, does it continue to hammer the hard drive once an application is fully open?
I'm PC technically uninformed so I'll just give you all the numbers I see on the front of the tower...
Window XP
3.2 GHz Pentium 4
512 MB DDr SDRAM
200 GB DMA hard drive
... anything else?
I think your major issues may be lack of RAM (easy upgrade) and your hard drive is probably fragmented to hell. The Windows 'registry' (where it stores information and configurations for the programs you install and Windows itself) is probably full of useless crap too.
While registry cleaners like CCLEANER improve on the levels of crap in the Registry, and defragmenting can help the hard drive (and takes forever) it won't cure it all. Ultimately PCs just get crufted up, and like most R/Cs, need stripping an d cleaning from time to time. The best solution is to backup everything, typically by burning it to CD or DVD, and then reformat the hard drive and start again using the install media you (should have) got with your PC.
Make sure you back everything up that you want to keep and make sure your backup was successful by testing in another PC.
If you didn't get any install media with the PC then either you need to get some from the vendor or buy a copy of Windows. I'd recommend sticking with XP, even with 2GB of SDRAM that machine will probably have a sicky trying to run Vista. My P4 2.8 didn't like it a lot.
I like to treat a re-install like a life laundry. It's no different from turning out all your old spares bixes and/or R/C junk and pitching out stuff you don't want.