hi i m getting a problem with my PC. it's hang after some time.

when i m using win98 it's hang after start . so i format the C:
and install it agian..
but when it's installing it's hang two time..

i install the window in another folder (rather then c:\windows)

but i got same problem..

now when i run scandisk it's also hang.

can any one tell me wot i do now???