When playing my mmorpg (ATITD3), the computer randomly does a BSOD and makes me restart. This can happen from a couple of seconds to over an hour from when I start up the game. Description of BSOD:

DRIVER_IRQL_NOT_LESS_OR_EQUAL
STOP: 0x000000D1 (0x00000004, 0x00000002, 0x00000001, 0xF7343D6E)
Mrv8000c.sys- Address F7343D6E base at F7343000, DateStamp 414b1c0b

Also, I am still getting my previously posted problem about the internet disconnecting. I have installed no new hardware lately, and have reformatted so it's not a virus.

As well, the display on my monitor shakes constantly; this is most noticable at the edges, where it may quiver distances up to a centimetre. This seems to only occur on the horizontal axis, and it gives me a bad headache. I have updated my monitor's driver from the manufacturer's website, but no joy. Thanks for helping me with these problems, I appreciate it.

My previous post:
(Hi, I've been trying to figure this out for over a week, but no luck. I reformatted yesterday so that may be able to help simplify things. When using the internet (both browser and games), the internet seems to disconnect. I use FireFox, and the internet is wireless. The symptoms are "Connection Has Timed Out" error in browsers, and being logged out of my game (ATITD3). After maybe 5 seconds everything goes back to normal and I can refresh and log back in. But this happens relatively frequently, maybe every 5-20 minutes.)

Log:

Logfile of HijackThis v1.99.1
Scan saved at 9:39:35 PM, on 10/1/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\TuneUp Utilities 2006\WinStylerThemeSvc.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
C:\Program Files\Google\Gmail Notifier\gnotify.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\Java\jre1.5.0_08\bin\jusched.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\MSN Messenger\MsnMsgr.Exe
C:\Program Files\Gadwin Systems\PrintScreen\PrintScreen.exe
C:\Program Files\802.11 Wireless LAN\802.11g Wireless Cardbus & PCI Adapter HW.51 V1.00\WlanCU.exe
C:\WINDOWS\System32\alg.exe
C:\WINDOWS\system32\wpabaln.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Documents and Settings\Katrina\Desktop\hijackthis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.ca/
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Program Files\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_08\bin\ssv.dll
O4 - HKLM\..\Run: [{0228e555-4f9c-4e35-a3ec-b109a192b4c2}] C:\Program Files\Google\Gmail Notifier\gnotify.exe
O4 - HKLM\..\Run: [AVG7_CC] C:\PROGRA~1\Grisoft\AVGFRE~1\avgcc.exe /STARTUP
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.5.0_08\bin\jusched.exe"
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [AtiPTA] atiptaxx.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [Gadwin PrintScreen 3.5] C:\Program Files\Gadwin Systems\PrintScreen\PrintScreen.exe /nosplash
O4 - Global Startup: Wireless Configuration Utility HW.51.lnk = C:\Program Files\802.11 Wireless LAN\802.11g Wireless Cardbus & PCI Adapter HW.51 V1.00\WlanCU.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - "C:\PROGRA~1\MSNMES~1\msgrapp.dll" (file missing)
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: AVG7 Alert Manager Server (Avg7Alrt) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgamsvr.exe
O23 - Service: AVG7 Update Service (Avg7UpdSvc) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgupsvc.exe
O23 - Service: AVG E-mail Scanner (AVGEMS) - GRISOFT, s.r.o. - C:\PROGRA~1\Grisoft\AVGFRE~1\avgemc.exe
O23 - Service: TuneUp WinStyler Theme Service (TUWinStylerThemeSvc) - TuneUp Software GmbH - C:\Program Files\TuneUp Utilities 2006\WinStylerThemeSvc.exe