Also, with the error involving the AVG driver the process that crashed was nmsrvc.exe, which is a Network Magic process so there may be a clash between AVG and Network Magic.
You could uninstall, at least temporarily, both AVG and Network Magic and see if it makes a difference.
Consider alternative security software such as Microsoft Security Essentials and Windows built-in firewall.
Also, there is one older driver that may be an issue and that is the ultra.sys which appears to dated Oct 9, 2002.
The ultra.sys is mentioned the following link as the cause of an IRQ_NOT_LESS_OR_EQUAL error:
»www.techsupportforum.com/forums/ ··· 200.html
If you a similar setup as in that link the ultra.sys could be an issue.
Also, the nvstor.sys appeared to cause a DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1) error so you may want to reload the chipset driver.
Also, there were two CLOCK_WATCHDOG_TIMEOUT (101) errors indicating a "hung processor":
»technet.microsoft.com/en-us/quer ··· ff557211
Consider updating the BIOS to version 1.60 which is listed to "Update CPU code".
Also, check the Event Viewer System logs for any errors or warnings that may indicate hardware issues.
Are you over-clocking in any way?