I'm at my wits' end. Can someone help me with this BSOD tech problem or direct me to a subreddit?

Posting for my brother here:

I bought a computer and a monitor earlier this week off of Amazon and it arrived yesterday. The problems began as soon as they arrived. When I went to set up my system, the computer would not connect to the monitor. I managed to fix this problem by removing the (extra?) graphics card. I started with attempting to pirate Sony Vegas 11 and when I downloaded the keygen, AVG immediately picked up on two Trojans. I clicked to repair them and stopped trying to download the software. Fast forward to this morning and I opened my computer, only to be met with a BSOD (third one down on the list of dumps). I went to restart it and the computer seemed to power up fine (and by fine I mean the lights came on with the fans) but it was the same problem as before with the monitor. My dad moved around the parts (put the graphics card back in, moved the RAM to a different slot and he may have messed with the motherboard) and voila, it powered up, only to shut down again with another BSOD a couple hours later (2nd from the top). At this point I installed WhoCrashed and it said that ntoskrnl.exe was responsible for the crash. I don't know if it's something left over from the Trojan that infected it or it's a software issue from moving the hardware around. Below are the dump files for all of the crashes up to this point and the specs for my computer (let me know if I included too much or possibly compromising information, I'm not so experienced in this). I am running it in safe mode with networking and it's worked up to this point.

http://www.2shared.com/file/ei4V9tn_/062312-20748-01.html http://www.2shared.com/file/zVSKgDAr/062312-31683-01.html http://www.2shared.com/file/_QQDLSij/062312-32807-01.html http://www.2shared.com/file/9y17rta0/062312-33743-01.html http://www.2shared.com/file/-mO7-pq_/062312-38719-01.html

computer name: SELKIRK-HP windows version: Windows 7 , 6.1, build: 7600 windows dir: C:\Windows CPU: AuthenticAMD AMD Athlon(tm) II X4 635 Processor AMD586, level: 16 4 logical processors, active mask: 15 RAM: 4294217728 total VM: 2147352576, free: 2000388096

TL;DR: My computer has been giving me the BSOD from day one. I'm a little frustrated.