Explorer.exe keeps crashing and restarting forcing me to do everything from the command prompt. I run XP sp2.
Here is my Hijackthis log:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 14:36:56, on 01/07/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16640)
Boot mode: Normal

Running processes:
C:\WINDOWS\System32\smss.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:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Avira\AntiVir PersonalEdition Premium\avguard.exe
C:\Program Files\Avira\AntiVir PersonalEdition Premium\sched.exe
C:\Program Files\Avira\AntiVir PersonalEdition Premium\avesvc.exe
C:\WINDOWS\system32\cisvc.exe
C:\Program Files\Comodo\Firewall\cmdagent.exe
C:\Program Files\Common Files\LightScribe\LSSrvc.exe
C:\Program Files\Nero\Nero8\Nero BackItUp\NBService.exe
C:\Program Files\Macrium\Reflect\ReflectService.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\UAService7.exe
C:\Program Files\Avira\AntiVir PersonalEdition Premium\avmailc.exe
C:\WINDOWS\system32\cidaemon.exe
C:\WINDOWS\system32\taskmgr.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\WINDOWS\system32\cmd.exe
C:\Documents and Settings\Barty\My Documents\My Received Files\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.co.uk/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://www.google.co.uk/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.co.uk/
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = 195.175.37.71:80
F2 - REG:system.ini: UserInit=C:\WINDOWS\system32\userinit.exe,,SKEYS /I,C:\WINDOWS\system32\MPK\MPK.exe
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: FlashFetcher - {16E8A050-74CE-43D5-8DC0-BADD7347B2DD} - C:\Program Files\GeoVid\FlashFetcher\FlashFetcher.dll
O2 - BHO: (no name) - {348FE907-249E-4C65-A838-F34A193FE1D1} - (no file)
O2 - BHO: MyBHO Class - {46B9D770-1B7D-45D1-81B4-AC07B2F127EF} - C:\PROGRA~1\FLASHS~1\FlashBHO.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: (no name) - {97C65EA3-54E2-450E-9804-8C6974B0869F} - C:\WINDOWS\system32\yayxvWOi.dll
O2 - BHO: (no name) - {A260787B-911C-49A1-AE73-EC76A3CEC27E} - C:\WINDOWS\system32\qoMeCrrQ.dll
O2 - BHO: Catcher Class - {ADECBED6-0366-4377-A739-E69DFBA04663} - C:\Program Files\Moyea\FLV Downloader\MoyeaCth.dll
O4 - HKLM\..\Run: [NBKeyScan] "C:\Program Files\Nero\Nero8\Nero BackItUp\NBKeyScan.exe"
O4 - HKLM\..\Run: [HydraVisionDesktopManager] C:\Program Files\ATI Technologies\ATI HydraVision\HydraDM.exe
O4 - HKLM\..\Run: [COMODO Firewall Pro] "C:\Program Files\Comodo\Firewall\cfp.exe" -h
O4 - HKCU\..\Run: [PeerGuardian] C:\Program Files\PeerGuardian2\pg2.exe
O4 - HKCU\..\Run: [UnHackMe Monitor] C:\Program Files\UnHackMe\hackmon.exe
O4 - HKCU\..\Run: [AutoPowerOn] C:\Program Files\AutoPowerOn\AutoPowerOn.exe
O4 - HKCU\..\Run: [BandwidthMonitor] C:\Program Files\BandwidthMonitor\BWMonitor.exe
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'NETWORK SERVICE')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: FlashFetcher - {07174FC7-B4C1-4643-9C03-B4D2148EB057} - C:\Program Files\GeoVid\FlashFetcher\FlashFetcher.dll
O9 - Extra 'Tools' menuitem: FlashFetcher - {07174FC7-B4C1-4643-9C03-B4D2148EB057} - C:\Program Files\GeoVid\FlashFetcher\FlashFetcher.dll
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.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
O9 - Extra button: NeoTrace It! - {9885224C-1217-4c5f-83C2-00002E6CEF2B} - C:\WINDOWS\system32\shdocvw.dll (HKCU)
O16 - DPF: RaptisoftGameLoader - http://www.miniclip.com/haphazard/ra...gameloader.cab
O16 - DPF: {2019DC25-D1C0-11D6-97B3-0008A124F542} (StreamPlug Class) - http://www.streamplug.com/StreamPlug/beta/SP.cab
O16 - DPF: {2917297F-F02B-4B9D-81DF-494B6333150B} (Minesweeper Flags Class) - http://messenger.zone.msn.com/binary...r.cab31267.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://baddassbartlett.spaces.live.c...d/MsnPUpld.cab
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsof...?1152447668109
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary...t.cab31267.cab
O16 - DPF: {B38870E4-7ECB-40DA-8C6A-595F0A5519FF} (MsnMessengerSetupDownloadControl Class) - http://messenger.msn.com/download/Ms...Downloader.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/ge...sh/swflash.cab
O16 - DPF: {F04A8AE2-A59D-11D2-8792-00C04F8EF29D} (Hotmail Attachments Control) - http://by106fd.bay106.hotmail.msn.co...x/HMAtchmt.ocx
O16 - DPF: {FD0B6769-6490-4A91-AA0A-B5AE0DC75AC9} (Performance Viewer Activex Control) - https://secure.logmein.com/activex/ractrl.cab?lmi=100
O20 - AppInit_DLLs: ,wbsys.dll C:\WINDOWS\system32\guard32.dll
O20 - Winlogon Notify: qoMeCrrQ - C:\WINDOWS\SYSTEM32\qoMeCrrQ.dll
O20 - Winlogon Notify: winpsa32 - C:\WINDOWS\SYSTEM32\winpsa32.dll
O23 - Service: AntiVir PersonalEdition Premium MailGuard (AntiVirMailService) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Premium\avmailc.exe
O23 - Service: AntiVir PersonalEdition Premium Scheduler (AntiVirScheduler) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Premium\sched.exe
O23 - Service: AntiVir PersonalEdition Premium Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Premium\avguard.exe
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: AntiVir PersonalEdition Premium MailGuard helper service (AVEService) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Premium\avesvc.exe
O23 - Service: COMODO Firewall Pro Helper Service (cmdAgent) - Unknown owner - C:\Program Files\Comodo\Firewall\cmdagent.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\1050\Intel 32\IDriverT.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: KService - Kontiki Inc. - C:\Program Files\Kontiki\KService.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Common Files\LightScribe\LSSrvc.exe
O23 - Service: Nero BackItUp Scheduler 3 - Nero AG - C:\Program Files\Nero\Nero8\Nero BackItUp\NBService.exe
O23 - Service: NMIndexingService - Nero AG - C:\Program Files\Common Files\Nero\Lib\NMIndexingService.exe
O23 - Service: Macrium Reflect Image Mounting Service (ReflectService) - Unknown owner - C:\Program Files\Macrium\Reflect\ReflectService.exe
O23 - Service: SecuROM User Access Service (V7) (UserAccess7) - Unknown owner - C:\WINDOWS\system32\UAService7.exe

--
End of file - 9332 bytes

Help would be lovely as my computer has been rendered into a useless block

Hi and welcome to the Daniweb forums .

==========

Can you please do the following.


===============

Scan with HijackThis and then place a check next to all the following, if present:


R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =

O2 - BHO: (no name) - {348FE907-249E-4C65-A838-F34A193FE1D1} - (no file)
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: (no name) - {97C65EA3-54E2-450E-9804-8C6974B0869F} - C:\WINDOWS\system32\yayxvWOi.dll
O2 - BHO: (no name) - {A260787B-911C-49A1-AE73-EC76A3CEC27E} - C:\WINDOWS\system32\qoMeCrrQ.dll

O20 - Winlogon Notify: qoMeCrrQ - C:\WINDOWS\SYSTEM32\qoMeCrrQ.dll


Now, close all instances of Internet Explorer and any other windows you have open except HiJackThis, click "Fix checked".

===============

Download Malwarebytes' Anti-Malware (http://www.majorgeeks.com/Malwarebyt...are_d5756.html) to your desktop.

* Double-click mbam-setup.exe and follow the prompts to install the program.
* At the end, be sure to checkmark the Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish.
* If an update is found, it will download and install the latest version.
* Once the program has loaded, select Perform full scan, then click Scan.
* When the scan is complete, click OK, then Show Results to view the results.
* Be sure that everything is checked, and click Remove Selected.
* When completed, a log will open in Notepad.
* Post the log back here.

Make sure that you restart the computer.

The log can also be found here:
C:\Documents and Settings\Username\Application Data\Malwarebytes\Malwarebytes' Anti-Malware\Logs\log-date.txt
Or at C:\Program Files\Malwarebytes' Anti-Malware\Logs\log-date.txt

Post new HJT log.

It's cool, I fixed it by myself. I looked around the forum and one thread suggested I did a Vundu scan. This found a few things but nothing changed. Then my anti-virus (Avira Premium) updated and started finding these evil .dll files in my System32 folder. It couldn't actually remove the files, it could only detect them. I deleted a couple manually but some were locked and even my Killbox software couldn't remove them. So in the end I booted my computer with a Linux live cd, (I used Slax) and removed the nasties without any hassle and it sorted my machine out.
I wrote down SOME of the virus files and are as follows: "Yayxvwoi.dll" "qomecrrq.dll" "tuvtmmcd.dll".
For other users with a similar problem I wouldn't recomend going on a witch hunt for evil dll files and if you do suspect a file of being dangerous don't delete it, change its extension first, I used .virus. This stops the file from running, but had it been a false positive and made the problem worse I could then restore them via the Linux cd.

Cheers for helping anyway,
Tom

Still, it wouldn't hurt to run it .