And my system is shutting down after 60 secs, even i formatted C:/ and again install OS but i am having same problem.
As after formating the hard drive C: also if you are getting the same error the only cause can be in the hardware. But there are one to two things you can do also but I am not sure how much this will help.
1. Try taking out the BIOS battery for couple of second and put it back.
2. Try installing different OS or rather format and install different OS and check if the problem persists.

Shabbir Bhimani