Computer Restarts after Boot-Up

Hi,

So I installed Windows 7 on my computer and it went through smoothly. I boot up and was able to install my Motherboards Network Drivers(Abit KN9 SLI). After that I tried to install the drivers for my network adapter(Linksys 300N). When I started to move the files from my external Harddrive(Maxtor 320GB USB powered) the computer restarted. After that, I resumed to moving the files and extracting them. The computer restarted halfways. After that i got worse. I would barely load up the OS and the computer would restart. At first i thought it was the OS. I tried re-installing the OS. I would get to install>Custom Install>[Partition D:] 279GB > And the installation process would begin. From the process it went from Copying Windows Files. Did it in a second and then it would begin on the second one. Before it hit 0% it would restart again. I don't know if it was the install of the OS or the Drivers that automatically installed, which I found it very weird because in the past, I would have to install these drivers my self using .exe's. Here's my set-ups:

CPU: AMD Anthlon 5400+
Socket: AM2
Memory: 1 GB Single Channel. 2 GB Total.
Motherboard: Abit KN9 SLI
Graphics:
Nvidia 7300 GT 256 Mb PCI-e
Nvidia 7300 GT 256 Mb PCI-e
Hard Drives:
First Hard Drive: 320 Gb Western Digital
Partition C: 'Whopper' 40 Gb
Partition D: 269 GB
Second Hard Drive: 1.5 TB Seagate
Partition F: 'Tera Monster' ~879 Gb
Partition G: 500 Gb

Help would be very much appreciated.

UPDATE:

I also tried to re-install windows by formating the partition (D: ) and reinstalling. Format was succesful, but the install went as usual above. So I can't boot in safe mode anymore.