Windows 7: BSOD's and freezes?

I have been receving diffrent BSOD's and freezes. We tried deleating all user's and then re-making them and I still got BSOD's and freezes. I think this is from the latest one:

System service exception
The bugcheck was: 0x0000003b (0x00000000c0000005, 0xfffff960001ab9e5, 0xfffff8800783a0e0, 0x0000000000000000). A dump was saved in: C:\Windows\MEMORY.DMP. Report Id: 070211-18423-01.

Before this one i have gotton these:
http://img638.imageshack.us/img638/2858/sam0921i.jpg
http://img840.imageshack.us/img840/2285/sam0876j.jpg

And most freezes would happen when playing videos or music. When it froze it would sound like a broken record.

I am also finding allot of these in event viewer:

Microsoft Antimalware Real-Time Protection feature has encountered an error and failed.
Feature: Behavior Monitoring
Error Code: 0x80004005
Error description: Unspecified error
Reason: The filter driver requires an up-to-date engine in order to function. You must install the latest definition updates in order to enable real-time protection.

System Manufacturer/Model Number: Gigayte Technology EP43-UD3L -OS: Windows 7 Professional x64 -CPU: Dual Core Pentuim(R) -Memory: 4.00 GB -Graphics Card: NVIDIA GeForce 8600 GT -Sound Card: HdAudio.sys -Monitor Displays: Generic PnP Monitor

My dump file is 326mb in size should i upload it?
Any help?

actually if they have been consistent, if you just follow these steps you'll have a minidump next time which is a lot smaller and you can just zip and attach it to your post.

To ensure minidumps are enabled:

Go to Start, in the Search Box type: sysdm.cpl, press Enter.
Under the Advanced tab, click on the Startup and Recovery Settings... button.
Ensure that Automatically restart is unchecked.
Under the Write Debugging Information header
Select Small memory dump (256 kB) in the dropdown box (the 256kb varies).
Ensure that the Small Dump Directory is listed as %systemroot%\Minidump.
OK your way out.
Reboot if changes have been made.

That will ensure you produce a minidump next crash.

Given the age of the motherboard my guess is you are using a vista driver in win 7 and it's crashing on you.
Once I have a minidump I can tell you which one(s) are responsible.

I don't have sufficent privllages to make changes to the machine. I am trying to track down the source.

Well that could become a problem when it comes to fixing the problem then, as you will more than likely need admin to remove/change what needs to be altered to fix the problem.

I'll be able to do things like that with permission from computer admin. He just isn't here right now. I would have to call him.

Well without even looking at anything just given the general age of the system. I'm guessing it's running a few vista drivers that need to be manually updated.
You can find win 7 drivers for older parts, there may be a bit more digging involved though.

What if the Windows 7 OS was just re-installed, dosn't Windows 7 just grab all of thre newest win 7 driver? Also i just got another BSOD system service exception:

The computer has rebooted from a bugcheck. The bugcheck was: 0x0000003b (0x00000000c0000005, 0xfffff80002c927b1, 0xfffff880064d7140, 0x0000000000000000). A dump was saved in: C:\Windows\MEMORY.DMP. Report Id: 070311-20732-01.

Not for everything no 90% of stuff yes, but there's a small portion that just get stuck with a vista driver instead.

Thanks for the help but the whole thing is just gonna get rebuilt.