Blue screen when playing games

[xAres]

So, i've had this error for months where my PC crashed when playing games. It has only recently started giving minidumps. Now that i have one, can you guys help me fix this?
Here's the analysis from windbg

*******************************************************************************
* *
* Bugcheck Analysis *
* *
*******************************************************************************

PAGE_FAULT_IN_NONPAGED_AREA (50)
Invalid system memory was referenced. This cannot be protected by try-except,
it must be protected by a Probe. Typically the address is just plain bad or it
is pointing at freed memory.
Arguments:
Arg1: ff73500a, memory referenced.
Arg2: 00000001, value 0 = read operation, 1 = write operation.
Arg3: b86714e9, If non-zero, the instruction address which referenced the bad memory
address.
Arg4: 00000000, (reserved)

Debugging Details:
------------------


Could not read faulting driver name

WRITE_ADDRESS: ff73500a

FAULTING_IP:
RDUMMY+4e9
b86714e9 c6410a01 mov byte ptr [ecx+0Ah],1

MM_INTERNAL_CODE: 0

CUSTOMER_CRASH_COUNT: 1

DEFAULT_BUCKET_ID: DRIVER_FAULT

BUGCHECK_STR: 0x50

PROCESS_NAME: AvastSvc.exe

LAST_CONTROL_TRANSFER: from 804ef19f to b86714e9

STACK_TEXT:
WARNING: Stack unwind information not available. Following frames may be wrong.
b1ef4a24 804ef19f 83dc8ea0 82f707b0 82f70914 RDUMMY+0x4e9
b1ef4a58 8054bd24 82f707b0 83dc1530 83dc15e8 nt!IopfCallDriver+0x31
b1ef4ab8 b80d9400 83dc1530 82f707b0 82f707b0 nt!ExAllocatePoolWithTag+0x3bc
b1ef4b4c b80e93ed 83dc1530 82f707b0 82f7091c disk+0x1400
b1ef4b68 804ef19f 83dc1530 82f707b0 82f707b0 CLASSPNP+0x13ed
b1ef4ba4 804ef19f 83db1020 82f707b0 82f70940 nt!IopfCallDriver+0x31
b1ef4bb4 805d8110 82e0c828 82ec08b0 b1ef4c04 nt!IopfCallDriver+0x31
b1ef4bc4 805d7e02 82ec08b0 82f707b0 82f7091c nt!RawReadWriteDeviceControl+0x60
b1ef4c04 804ef19f 82ec07f8 82f707b0 82f707b0 nt!RawDispatch+0x114
b1ef4c14 b7ec609e 82f707b0 8aabf2e0 868d6338 nt!IopfCallDriver+0x31
b1ef4c40 804ef19f 82e0c828 82f707b0 806e7410 fltMgr!FltGetIrpName+0x12e0
b1ef4c50 8057f98e 82f7091c 868d6338 82f707b0 nt!IopfCallDriver+0x31
b1ef4c64 8058081d 82e0c828 82f707b0 868d6338 nt!IopSynchronousServiceTail+0x70
b1ef4d00 80579298 000013a8 00000000 00000000 nt!IopXxxControlFile+0x5c5
b1ef4d34 8054167c 000013a8 00000000 00000000 nt!NtDeviceIoControlFile+0x2a
b1ef4d34 7c90e514 000013a8 00000000 00000000 nt!KiFastCallEntry+0xfc
09b3a340 00000000 00000000 00000000 00000000 0x7c90e514


STACK_COMMAND: kb

FOLLOWUP_IP:
RDUMMY+4e9
b86714e9 c6410a01 mov byte ptr [ecx+0Ah],1

SYMBOL_STACK_INDEX: 0

SYMBOL_NAME: RDUMMY+4e9

FOLLOWUP_NAME: MachineOwner

MODULE_NAME: RDUMMY

IMAGE_NAME: RDUMMY.sys

DEBUG_FLR_IMAGE_TIMESTAMP: 47242fec

FAILURE_BUCKET_ID: 0x50_RDUMMY+4e9

BUCKET_ID: 0x50_RDUMMY+4e9

Followup: MachineOwner
---------

So i'm assuming it's a driver problem with rdummy.sys caused by my antivirus (avast). Is there any way to fix this? Thanks .

 

[Hawkeye22]

I use avast version 7 and I don't have a rdummy.sys file. Are you sure it's an avast file and not some malware? Also, does it give the same error every time? The error reads like an access violation, which is due to bad programming, not the system it self.

It could also be a memory problem. Try running a few passes of memtest86+ and see what turns up.

http://www.memtest.org/

 

[xAres]

Yeah, mine's version 7, i tried memtest ages ago and that wasn't the problem, i'll try a full system scan and see if i find anything

 

[xAres]

I have lots more dumps if these help, sorry i haven't been on. I've put them in a .rar archive, there's 9 of them, i'll upload more if i get the problem (which i probably will) again. here's the link http://www.4shared.com/get/dKquVXLh/minidumps.html