BSOD at seemingly random times -- both during heavy load and at idle.

First off, I apologize for huge amount of minidump files you'll be seeing soon. This problem has been going on for well over a year, and I have been both incredibly lazy and too busy when getting around to fixing it. The BSODs I receive happen at seemingly random times. They can happen at:

• The start of a session, when I first boot up my PC
• During my session, both at idle and heavy loads (while gaming and while browsing)
• At the end of my session, when I shut down my computer. My PC will BSOD during the actual shut-down procedure.

On top of that. I haven't been able to update Windows for well over a year, because the update process gets interrupted. "Code 8024200D - Windows Update encountered an unknown error". I have gone through the steps found here, but that error does not disappear. I do not know if this is relevant, but I thought I'd mention it.

Here are the zipped minidumps. I hope I did this right; I apologize if I did not.

Thank you. For some reason, that update did not show up in my Windows Update tab, nor was it in past updates nor did it show up after checking for new updates. I've installed SP1, and I'll let you know if any more BSOD's occur. Thank you very much.