PC Keeps Shutting Off After Login

Navjit Khaira

Honorable
Jul 2, 2013
12
0
10,510
Hello,

I install a new CPU in my cousin's PC and on first boot up it appeared to run fine. We get back a few hours later to try it out and run some games but as soon as we login the computer seems to completely shut off.

SPECS:
Intel i5-2400 (Old one was a Intel G860)
Gigabyte H61M-DS2
GTX 750Ti
XFX 550W PSU (relatively new, installed it over the summer)

The only problem the first time was that it kept on showing the old CPU's name in task manager and device manager, so not sure if this is a problem?
Also the BIOS screen sits there for a long time.

Thank You for any help!