my pc freezes at windows startup process, it does not start in safe or any other mode.,also
it is freezes when i run a xp-sp2 cd format for it,at the stage when i press enter for new xp installation ->estimating harddrive memory 7654mb at bank 0 port 0 .... i have checked my psu with multimeter, ram at another pc and cmos battery also.my pc configration r
You didn't didn't mention testing the hard drive, one test which you should always carry out when checking hardware. You can either test it "in situ" with "SeaTools for DOS", or put it into a working PC (as a second drive) and test it with "SeaTools for Windows". Click "Downloads" here: http://www.seagate.com/support/downloads/seatools/
(SeaTools can be used to test any brand of hard drive).