who manufactures your hard drive, ram, mother board?
Also have you tryed reseating the connections? Try pulling ram out and reseating it. Disconnect the IDE cable and replace it. This will a lot of times fix issues.
I had an issue once where I would lose RAM. I pulled it out and re-seated the card and it was fine. I gues I bumped the box and un seated it just enough. Ribbon cables are very cheap, so this is a quick check.
Maxtor makes very nice hard drive utility software. But this is usally for thier drives http://www.maxtor.com/portal/site/Maxtor/menuit...0Downloads&downloadID=113
figure out who made your I will see what I can find. There is also the Ultimate Boot disk... http://www.startdisk.com/Web1/ubd/ubd.htm http://www.ultimatebootcd.com/
Try a google search on some of these
Drive Fitness Test (IBM/Hitachi) 4.02
PowerMax (Maxtor/Quantum) 4.09/4.21
SCSIMax (Maxtor) 2.1
DLG Diagnostic (Western Digital) 4.15/5.04c
Data Lifeguard (Western Digital) 11.0
SeaTools Desktop (Seagate) 1.06.02/3.00.07en
Diagnostic Tool (Fujitsu) 6.20
SHDIAG (Samsung) 1.25
HUTIL (Samsung) 1.19
GWSCAN (Gateway) 3.15
GWSCAN (Gateway) 5.09
Salvation HDD Scan and Repair 3.0