Help needed: PC Freezes on start up

Count_Zero

Honorable
Jun 6, 2013
2
0
10,510
Hi guys, this is my first thread as I am new to the forums, however I have been using this site for a while to answer a lot of my own questions regarding pc's.
I'm currently doing a course on pc repair and upgrading and have recently finished building my very own desktop pc.

However....It crashes. I would like some help diagnosing the problem as I'm unsure whether it is hardware or software related and I do not wish to make a costly replacement!

I built the pc and originally had a 32 bit version of linux zorin 6.2 installed (I have a 64 bit register). This was working fine, however when starting the pc it would often crash/ freeze and I would run the 'clear disk space option' and/or the 'repair packages' option and after a restart it would work ok.

I have now replaced said operating system with ubuntu linux 13.04 and have removed zorin from my system. However the pc freezes on the startup screen when asking for user authentication.

I have read the troubleshooting section of my 'upgrading and repairing pc's' book and I believe that if it is not a software error it may be an overheated CPU.(although not sure as it usually crashes on the first boot attempt).

Would greatly appreciate any advice to help me diagnose this issue. Many thanks for reading this

-Count_Zero

my system specs are as follows:
Intel pentium 4 3.00Ghz Processor
Gigabyte H61M S2PV motherboard
Corsair GS 800W PSU
Corsair Vengence 16Gb Ram
Asus GeForce GT610 Graphics Card
60'-70' degrees C' CPU temperature
Linux Ubuntu 13.04 OS