Judging by what you posted temp and cooling wise your computer is overheating and that's the first thing to rectify. 64 C on an idle load is not acceptable and isn't really preferred with a full load. I'm a little paranoid and freak out whenever my CPU get over 35, but really 50 should be your max on a load.
Invest in a good cooling solution for your system. A pretty decent system will only set you back 20 to 30 dollars. If you are looking for some help on what to look for take a look at this Tom's Hardware review of sub $40 cooling solutions.
Also you might want to enable your Blue Screen of Death (as terrible as that sounds) so that you can debug the problematic lockups. This is done by:
--> right clicking on "Computer" from the start menu
--> Select "Properties"
--> Select "Advanced System Settings"
--> Select the "Advanced" Tab
--> Select the "Startup and Recovery"
--> Make sure that "Write an event to the system log" is enabled.
Sometimes there are cleaners that automatically stop BSOD's from recording (Advanced System Care) and you might want to look into preventing that. Once you've checked this issue, then I suggest using NirSoft's BlueScreenView to view the crash details/debug related issues.
Finally, I would check and recheck your PC and ALL of your connections. I actually had a similar situation and found out that one of the internal motherboard USB cables was incorrectly connected, thus causing issues.
Update
I have put together some questions for general troubleshooting and diagnosis of crashes or freezes. Please refer to them as well, as they may also help you in your search for the issue.
Sounds like a bad memory subsystem to me (probably RAM modules). If you're getting dumps for varying processes, and you've tried multiple drives and re-installing, then it's probably not drives or a Windows setting.
If you don't have other RAM sticks to swap in for testing:
- Ensure you have the latest BIOS for the motherboard. (Asus Support) - Currently the latest version is 0802, released Jan 17, 2011.
If that doesn't help...
- Go get Memtest86+ and run it for 3 days straight. We do a minimum 72-hour burn-in on all new systems, and have caught plenty of bad RAM in the 3rd day.
It may be a faulty motherboard, but 90% of the time it's the RAM. Unfortunately unless you have replacement parts to swap in and try, it could take a while to find the cause.
Best Answer
BSOD 1a could be related to bad RAM.
Download Memtest burn to disk and run for at least 5 hours, if it finds errors then you should replace the RAM and see if that fixes it, but as Ramhound has stated it would be good if we could see the information of the BSOD so we can try and narrow down where the problem lies (could be a softwrae issue)