'Code guard was activated due to application malfunction.'

[Skatoony]

Yesterday I was playing on one of the co-op dedicated servers that seem to have shown up recently. However, I ended up crashing twice with a 'malfunction' pop-up error, and had to kill the game through the task manager. The second crash stopped me from trying to play again but I've just looked into the log and noticed

ERR: Code guard was activated due to application malfunction. Please report.

...was shown in the log for both crashes.

My system spec is

AMD X2 4800+ @ 2.4Ghz
MSI K8N Neo4 Platinum nForce 4 Ultra motherboard
2GB DDR400 RAM (running at 333MHz due to a known bug in the nForce 4 chipsets)
GeForce 9800GT 1GB
Creative Audigy 2 ZS
Windows XP Pro 32-bit with SP3.
All drivers and updates installed.

20,000 character limit makes it impossible to post the log and configuration so they're uploaded to a paste bin.

SamHD.log & SeriousSamHD.ini (http://pastebin.ca/1859633)

Any ideas?

[Dancing Muton]

Please add the .rpt files as well. You can use dropbox.com if you can't post directly.

[Skatoony]

Uploaded to my webhost.

SamHD.rpt (http://cosmic-dreams.net/sshd/SamHD.rpt)
SamHD_CodeGuard.rpt (http://cosmic-dreams.net/sshd/SamHD_CodeGuard.rpt)

[Skatoony]

Upgraded to an Intel Core 2 Duo E6700, 4GB RAM with an Intel 975X based motherboard and I'm -still- crashing when playing online. :(