My computer seems to be sending out spam emails to people in my address book, obviously without my permission.

I have run scans by multiple anti-malware programs but nothing stops them. It has happened twice in the last few days.

Can you help?

I am using Windows XP on a Dell Dimension 5100

My HijackThis file is as follows:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 7:09:55 PM, on 11/1/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16915)
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:\Program Files\Webroot\Spy Sweeper\WRConsumerService.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
c:\Program Files\Microsoft Security Essentials\MsMpEng.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Avira\AntiVir Desktop\sched.exe
C:\WINDOWS\system32\spool\drivers\w32x86\3\hpztsb04.exe
C:\WINDOWS\system32\dla\tfswctrl.exe
C:\Program Files\Dell Support Center\bin\sprtcmd.exe
C:\Program Files\NCH Swift Sound\FastFox\fastfox.exe
C:\Program Files\Avira\AntiVir Desktop\avgnt.exe
C:\Program Files\Acronis\TrueImageHome\TrueImageMonitor.exe
C:\Program Files\Acronis\TrueImageHome\TimounterMonitor.exe
C:\Program Files\Common Files\Acronis\Schedule2\schedhlp.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Common Files\Acronis\Schedule2\schedul2.exe
C:\Program Files\Avira\AntiVir Desktop\avguard.exe
C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\Program Files\Microsoft Security Essentials\msseces.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\Webroot\Spy Sweeper\SpySweeperUI.exe
C:\Program Files\Dell Support Center\bin\sprtsvc.exe
C:\Program Files\Webroot\Spy Sweeper\SpySweeper.exe
C:\Program Files\Common Files\Microsoft Shared\Windows Live\WLIDSVC.EXE
C:\WINDOWS\system32\SearchIndexer.exe
C:\Program Files\Common Files\Microsoft Shared\Windows Live\WLIDSvcM.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
C:\Program Files\SUPERAntiSpyware\SUPERAntiSpyware.exe
C:\Program Files\Siber Systems\AI RoboForm\RoboTaskBarIcon.exe
C:\Program Files\Secunia\PSI\psi.exe
C:\Program Files\Update Notifier\updatenotifier.exe
C:\PROGRA~1\Webshots\Webshots.scr
C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
C:\Program Files\Lavasoft\Ad-Aware\AAWTray.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\a-squared Free\a2service.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://www.usatoday.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.usatoday.com/
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://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.dell4me.com/myway
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: &Yahoo! Toolbar Helper - {02478D38-C3F9-4efb-9B51-7695ECA05670} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: IE BHO Utility - {5AB7104A-B71F-49AD-9154-F7F8806AE848} - C:\Program Files\Surf Canyon\surfcanyon.dll
O2 - BHO: DriveLetterAccess - {5CA3D70E-1895-11CF-8E15-001234567890} - C:\WINDOWS\system32\dla\tfswshx.dll
O2 - BHO: RoboForm - {724d43a9-0d85-11d4-9908-00400523e39a} - C:\Program Files\Siber Systems\AI RoboForm\roboform.dll
O2 - BHO: Windows Live ID Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\5.3.4501.1418\swg.dll
O2 - BHO: Google Dictionary Compression sdch - {C84D72FE-E17D-4195-BB24-76C02E2E7C4E} - C:\Program Files\Google\Google Toolbar\Component\fastsearch_B7C5AC242193BB3E.dll
O2 - BHO: WOT Helper - {C920E44A-7F78-4E64-BDD7-A57026E7FEB7} - C:\Program Files\WOT\WOT.dll
O2 - BHO: MSN Toolbar Helper - {d2ce3e00-f94a-4740-988e-03dc2f38c34f} - C:\Program Files\MSN\Toolbar\3.0.0983.0\msneshellx.dll
O2 - BHO: Java™ Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O2 - BHO: SingleInstance Class - {FDAD4DA1-61A2-4FD8-9C17-86F7AC245081} - C:\Program Files\Yahoo!\Companion\Installs\cpn\YTSingleInstance.dll
O3 - Toolbar: &RoboForm - {724d43a0-0d85-11d4-9908-00400523e39a} - C:\Program Files\Siber Systems\AI RoboForm\roboform.dll
O3 - Toolbar: Webshots Toolbar - {C17590D2-ECB4-4b15-8820-F58798DCC118} - C:\Program Files\Webshots\WSToolbar4IE.dll
O3 - Toolbar: MSN Toolbar - {1E61ED7C-7CB8-49d6-B9E9-AB4C880C8414} - C:\Program Files\MSN\Toolbar\3.0.0983.0\msneshellx.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: Google Toolbar - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - C:\Program Files\Google\Google Toolbar\GoogleToolbar_32.dll
O3 - Toolbar: WOT - {71576546-354D-41c9-AAE8-31F2EC22BF0D} - C:\Program Files\WOT\WOT.dll
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] "C:\WINDOWS\system32\spool\drivers\w32x86\3\hpztsb04.exe"
O4 - HKLM\..\Run: [dla] "C:\WINDOWS\system32\dla\tfswctrl.exe"
O4 - HKLM\..\Run: [dellsupportcenter] "C:\Program Files\Dell Support Center\bin\sprtcmd.exe" /P dellsupportcenter
O4 - HKLM\..\Run: [FastFox] "C:\Program Files\NCH Swift Sound\FastFox\fastfox.exe" -logon
O4 - HKLM\..\Run: [Ad-Watch] "C:\Program Files\Lavasoft\Ad-Aware\AAWTray.exe"
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\Run: [TrueImageMonitor.exe] "C:\Program Files\Acronis\TrueImageHome\TrueImageMonitor.exe"
O4 - HKLM\..\Run: [AcronisTimounterMonitor] "C:\Program Files\Acronis\TrueImageHome\TimounterMonitor.exe"
O4 - HKLM\..\Run: [Acronis Scheduler2 Service] "C:\Program Files\Common Files\Acronis\Schedule2\schedhlp.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [MSSE] "c:\Program Files\Microsoft Security Essentials\msseces.exe" -hide
O4 - HKLM\..\Run: [SpySweeper] C:\Program Files\Webroot\Spy Sweeper\SpySweeperUI.exe /startintray
O4 - HKCU\..\Run: [Microsoft Works Update Detection] C:\Program Files\Microsoft Works\WkDetect.exe
O4 - HKCU\..\Run: [ctfmon.exe] "C:\WINDOWS\system32\ctfmon.exe"
O4 - HKCU\..\Run: [swg] "C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe"
O4 - HKCU\..\Run: [SUPERAntiSpyware] "C:\Program Files\SUPERAntiSpyware\SUPERAntiSpyware.exe"
O4 - HKCU\..\Run: [RoboForm] "C:\Program Files\Siber Systems\AI RoboForm\RoboTaskBarIcon.exe"
O4 - Startup: Secunia PSI.lnk = C:\Program Files\Secunia\PSI\psi.exe
O4 - Startup: Update Notifier.lnk = C:\Program Files\Update Notifier\updatenotifier.exe
O4 - Startup: Webshots.lnk = C:\Program Files\Webshots\Launcher.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: &Webshots Photo Search - res://C:\Program Files\Webshots\WSToolbar4IE.dll/MENUSEARCH.HTM
O8 - Extra context menu item: Customize Menu - file://C:\Program Files\Siber Systems\AI RoboForm\RoboFormComCustomizeIEMenu.html
O8 - Extra context menu item: Fill Forms - file://C:\Program Files\Siber Systems\AI RoboForm\RoboFormComFillForms.html
O8 - Extra context menu item: RoboForm Toolbar - file://C:\Program Files\Siber Systems\AI RoboForm\RoboFormComShowToolbar.html
O8 - Extra context menu item: Save Forms - file://C:\Program Files\Siber Systems\AI RoboForm\RoboFormComSavePass.html
O9 - Extra button: Fill Forms - {320AF880-6646-11D3-ABEE-C5DBF3571F46} - file://C:\Program Files\Siber Systems\AI RoboForm\RoboFormComFillForms.html
O9 - Extra 'Tools' menuitem: Fill Forms - {320AF880-6646-11D3-ABEE-C5DBF3571F46} - file://C:\Program Files\Siber Systems\AI RoboForm\RoboFormComFillForms.html
O9 - Extra button: Save - {320AF880-6646-11D3-ABEE-C5DBF3571F49} - file://C:\Program Files\Siber Systems\AI RoboForm\RoboFormComSavePass.html
O9 - Extra 'Tools' menuitem: Save Forms - {320AF880-6646-11D3-ABEE-C5DBF3571F49} - file://C:\Program Files\Siber Systems\AI RoboForm\RoboFormComSavePass.html
O9 - Extra button: RoboForm - {724d43aa-0d85-11d4-9908-00400523e39a} - file://C:\Program Files\Siber Systems\AI RoboForm\RoboFormComShowToolbar.html
O9 - Extra 'Tools' menuitem: RoboForm Toolbar - {724d43aa-0d85-11d4-9908-00400523e39a} - file://C:\Program Files\Siber Systems\AI RoboForm\RoboFormComShowToolbar.html
O9 - Extra button: (no name) - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - (no file)
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
O16 - DPF: {1F2F4C9E-6F09-47BC-970D-3C54734667FE} - http://www.symantec.com/techsupp/asa/ctrl/LSSupCtl.cab
O16 - DPF: {3451DEDE-631F-421C-8127-FD793AFC6CC8} (ActiveDataInfo Class) - http://www.symantec.com/techsupp/asa/ctrl/SymAData.cab
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://gfx1.hotmail.com/mail/w2/resources/MSNPUpld.cab
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdat...b?1174237304375
O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cab
O16 - DPF: {EB387D2F-E27B-4D36-979E-847D1036C65D} (QDiagHUpdateObj Class) - http://h30043.www3.hp.com/hpdj/en/check/qdiagh.cab?326
O16 - DPF: {EF791A6B-FC12-4C68-99EF-FB9E207A39E6} (McFreeScan Class) - http://download.mcafee.com/molbin/iss-loc/...570/mcfscan.cab
O16 - DPF: {F04A8AE2-A59D-11D2-8792-00C04F8EF29D} (Hotmail Attachments Control) - http://by13fd.bay13.hotmail.msn.com/activex/HMAtchmt.ocx
O18 - Protocol: wot - {C2A44D6B-CB9F-4663-88A6-DF2F26E4D952} - C:\Program Files\WOT\WOT.dll
O20 - Winlogon Notify: !SASWinLogon - C:\Program Files\SUPERAntiSpyware\SASWINLO.DLL
O23 - Service: a-squared Free Service (a2free) - Emsi Software GmbH - C:\Program Files\a-squared Free\a2service.exe
O23 - Service: Acronis Scheduler2 Service (AcrSch2Svc) - Acronis - C:\Program Files\Common Files\Acronis\Schedule2\schedul2.exe
O23 - Service: Avira AntiVir Scheduler (AntiVirSchedulerService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir Desktop\avguard.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: Automatic LiveUpdate Scheduler - Symantec Corporation - C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe
O23 - Service: Bonjour Service - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: DSBrokerService - Unknown owner - C:\Program Files\DellSupport\brkrsvc.exe
O23 - Service: Google Update Service (gupdate1c9e0d315a313a0) (gupdate1c9e0d315a313a0) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe
O23 - Service: Google Software Updater (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: Lavasoft Ad-Aware Service - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
O23 - Service: LiveUpdate - Symantec Corporation - C:\PROGRA~1\Symantec\LIVEUP~1\LUCOMS~1.EXE
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\SNDSrvc.exe
O23 - Service: SupportSoft Sprocket Service (dellsupportcenter) (sprtsvc_dellsupportcenter) - SupportSoft, Inc. - C:\Program Files\Dell Support Center\bin\sprtsvc.exe
O23 - Service: Webroot Spy Sweeper Engine (WebrootSpySweeperService) - Webroot Software, Inc. (www.webroot.com) - C:\Program Files\Webroot\Spy Sweeper\SpySweeper.exe
O23 - Service: Webroot Client Service (WRConsumerService) - Webroot Software, Inc. - C:\Program Files\Webroot\Spy Sweeper\WRConsumerService.exe

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End of file - 14203 bytes

Thanks for any help you can give me