Computer Techs Unite!

Alright guys, I know you're out there and reading this. Anyone who can help me with my computer issues would be a godsend right now. The past two weeks my computer has been randomly resetting itself, or just turning itself off, or taking 6 boot attempts to get into windows, sometimes stalling and not even going into POST. It will either: boot up fine Boot up to windows and turn off Boot up to BIOS and say my CPU setting was incorrect and it hung (no, I do not overclock) Not even do POST and just hang Sometimes like now I can get into Windows fine and everything seems to work great, until it just turns off. Like I turned it on before I left for class at 3, when I got home at 5 it was off. Now it's been on for an hour and a half again. I replaced the power supply; same issue. Oh, the computer wasn't keeping time either; so I replaced the battery today. I read at one point it was a driver issue, so I reinstalled all my drivers. Was working fine for a few days, and then it started up again. I just recently got the HP 6100 AIO which might be causing the driver conflict, IF that's the only error. I uninstalled the printer but it's already turned off once since then. I learned how to make it show me the blue screens instead of turning off all the time. Some of the error messages I've gotten are: PAGE_FAULT_IN_NONPAGED_AREA. STOP: 0x00000050 BAD_POOL_HEADER. STOP: 0x00000019 MEMORY_MANAGEMENT 0x0000001A Then just a STOP: 0x00000023 I've tried looking it all up but it doesn't seem to really be related. The computer is 3 years old :( Can anyone help me? What should I do?