Many BSOD...HEYLP!!

OS is Win 7 Ultimate x64
is original installed
not sure if oem or retail...bloke who built it installed it...assume it's oem.
system is 3 months old
and so is the OS..no reinstalls

Keep getting random crashes, can happen any time, seem to have different reasons from wht i can see. can occur at any time, and seem to have no association with certain programs.
have tried testing memory with memtest 86+ and get no problems showing up withing 3 passes. individual dimms tested and in various combinations.

no idea whts causing this HEYLP!! it's driving me round the bend lol
i've run the bsod thingy and done the performance report thing which i've attached in zip.

Thanks
Ole

Some BSODs were triggered by Comodo Firewall, remove it and install a fresh copy

usbfilter.sys was also involved

This is an upper filter driver for AMD SB700 chipsets for USB 1.0/1.1 insertion and removal notification, and the AMD SB700 documentation for usbfilter.sys says to do the following to uninstall it:

To uninstall the driver, proceed as following
1) open registry, go to
HKLM\System\CurrentControlSet\Control\Class\{36FC9E60-C465-11CF-8056-444553540000}
and remove "usbfilter" from UpperFilter.
2) open registry, delete key HKLM\System\CurrentControlSet\Services\usbfilter3) delete usbfilter.sys from \%system32%\drivers directory.
4) reboot

Code:

BugCheck A, {fffff9801d8ccfa1, 2, 0, fffff80002e6c44c}

Unable to load image usbfilter.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for usbfilter.sys
*** ERROR: Module load completed but symbols could not be loaded for usbfilter.sys
Probably caused by : usbfilter.sys ( usbfilter+1ab3 )

memtest 86+ and get no problems showing up withing 3 passes.

Do at least 7 passes (it normally takes 6-8 hours)

thanks for the speedy reply, i've redone comodo & uninstalled the driver. seems to be quite stable...atm lol
i'll run memtest86+ tonight