Windows 7 - Recurring BSODS; page fault in nonpaged area

Hey all.

I built my computer last August, and since then it has been running wonderfully... except for recurring BSODs. The most common message on the BSODs is "Page fault in nonpaged area." The BSODs happen occasionally, but seem to be more frequent of late, which means fixing them is a priority. They happen when I am using programs -- Photoshop, Firefox or Chrome, games, etc. Never had one happen when it's just on the desktop.

I am running Windows 7 Professional x64. I got it through the MSDNAA (Microsoft Developers Network Academic Alliance). Everything on this computer is new as of August 2011. Further system specs are in my profile.

I've attached the report and dump report as per the posting instructions. If any more information is needed, I will provide it to the best of my ability! Thank you all.

Edit: I am behind an update or two, I think. I just plugged my computer in for the first time in three or four weeks. I can install updates before proceeding if necessary.

The latest dump shows "aswMonFlt.sys" as the possible cause. That is an Avast system driver.

Should I uninstall Avast for now/forever? Is there any way to test if that has been causing the problem all this time? I'm fairly certain I installed it soon after constructing the computer, so it's been around long enough.

Its hard to say. May want to change the settings for the system dump to complete.

I'm in Adv System Settings, but I don't see that option in the dropdown menu. All I have is "none," "kernel," and "small."

Is there some other way to change it to complete? Or anything I can do now to provide more info/fix things?

Thanks for replying, btw.