Thanx for the help friends.
The problem has been solved.
I just cleared the BIOS, cleaned the RAm and re-inserted it.
Now for the time being it is working FIne.
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Friends , got a new problem now
i think the problem was not with the RAM but was with my BIOS.
When i cleared the BIOS, it starts working.
Now when i make some changes in BIOS, it gave some errors.
What can b the problem??
ALso, i had to reinstall GRUB thats y i inserted Live UBUNTU Cd and a when i selected start or install option then it gave this error::
[4294670.569000] Invalid compressed format[err=1]
[4294670.570000] Kernel Panic-Not syncing: VFS : Unable to mount root fs on unknown-block(1,0)
[4294670.570000]
When i inserted Live Knoppix DVD it gave back this:
Kernel Panic - not syncing : VFS : unable to mount root fs on unknown - block(1,3)
What can b the problem ???