web browser disappears please HELP me

hi guys,here is my problem my computer has been running slow lately and the web browser keeps disappearing from taskbar and i have to use task manager to bring back the browser on the taskbar,can someone please help me with this here is my hijackthis log

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 10:34:22 AM, on 9/24/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16705)
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:\Program Files\Lavasoft\Ad-Aware\aawservice.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\brsvc01a.exe
C:\WINDOWS\system32\brss01a.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
C:\Program Files\CyberLink\PowerDVD\PDVDServ.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
C:\WINDOWS\RTHDCPL.EXE
C:\Program Files\Java\jre1.5.0_02\bin\jusched.exe
C:\Program Files\McAfee.com\Agent\mcagent.exe
C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe
C:\PROGRA~1\AVG\AVG8\avgwdsvc.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\PROGRA~1\McAfee\MSC\mcmscsvc.exe
c:\program files\common files\mcafee\mna\mcnasvc.exe
C:\PROGRA~1\AVG\AVG8\avgrsx.exe
C:\Program Files\Webroot\Washer\wwDisp.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Aladdin Systems\iClean\iClean.exe
C:\Program Files\Webroot\Washer\WasherSvc.exe
C:\PROGRA~1\AVG\AVG8\avgemc.exe
C:\Program Files\iPod\bin\iPodService.exe
c:\PROGRA~1\mcafee\msc\mcuimgr.exe
C:\Program Files\McAfee\MPF\MPFSrv.exe
C:\Program Files\Webroot\Spy Sweeper\SpySweeper.exe
C:\WINDOWS\system32\wuauclt.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: WormRadar.com IESiteBlocker.NavFilter - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Program Files\AVG\AVG8\avgssie.dll
O2 - BHO: scriptproxy - {7DB2D5A0-7241-4E79-B68D-6309F01C5231} - C:\Program Files\McAfee\VirusScan\scriptsn.dll
O4 - HKLM\..\Run: [RemoteControl] "C:\Program Files\CyberLink\PowerDVD\PDVDServ.exe"
O4 - HKLM\..\Run: [RTHDCPL] "C:\WINDOWS\RTHDCPL.EXE"
O4 - HKLM\..\Run: [Alcmtr] "C:\WINDOWS\ALCMTR.EXE"
O4 - HKLM\..\Run: [Recguard] "C:\WINDOWS\SMINST\RECGUARD.EXE"
O4 - HKLM\..\Run: [Reminder] "C:\WINDOWS\Creator\Remind_XP.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.5.0_02\bin\jusched.exe"
O4 - HKLM\..\Run: [mcagent_exe] "C:\Program Files\McAfee.com\Agent\mcagent.exe" /runkey
O4 - HKLM\..\Run: [ISUSPM Startup] "C:\Program Files\Common Files\InstallShield\UpdateService\ISUSPM.exe" -startup
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Common Files\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [CanonSolutionMenu] "C:\Program Files\Canon\SolutionMenu\CNSLMAIN.exe" /logon
O4 - HKLM\..\Run: [CanonMyPrinter] "C:\Program Files\Canon\MyPrinter\BJMyPrt.exe" /logon
O4 - HKLM\..\Run: [NeroFilterCheck] "C:\WINDOWS\system32\NeroCheck.exe"
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [AppleSyncNotifier] "C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleSyncNotifier.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: [AVG8_TRAY] "C:\PROGRA~1\AVG\AVG8\avgtray.exe"
O4 - HKCU\..\Run: [ctfmon.exe] "C:\WINDOWS\system32\ctfmon.exe"
O4 - HKCU\..\Run: [Washer] C:\Program Files\Washer\washer.exe /0
O4 - HKCU\..\Run: [Window Washer] "C:\Program Files\Webroot\Washer\wwDisp.exe"
O4 - HKCU\..\Run: [iClean] "C:\Program Files\Aladdin Systems\iClean\iClean.exe" /I
O4 - HKCU\..\RunOnce: [Index Washer] C:\Program Files\Webroot\Washer\WashIdx.exe "Owner"
O4 - HKUS\S-1-5-18\..\Run: [Power2GoExpress] NA (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [Power2GoExpress] NA (User 'Default user')
O4 - Global Startup: BigFix.lnk = C:\Program Files\BigFix\bigfix.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_02\bin\npjpi150_02.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_02\bin\npjpi150_02.dll
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\system32\Shdocvw.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
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O18 - Protocol: linkscanner - {F274614C-63F8-47D5-A4D1-FBDDE494F8D1} - C:\Program Files\AVG\AVG8\avgpp.dll
O20 - AppInit_DLLs: avgrsstx.dll
O23 - Service: McAfee Application Installer Cleanup (0061161212202812) (0061161212202812mcinstcleanup) - Unknown owner - C:\WINDOWS\TEMP\006116~1.EXE (file missing)
O23 - Service: Lavasoft Ad-Aware Service (aawservice) - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware\aawservice.exe
O23 - Service: Avira AntiVir Personal - Free Antivirus Scheduler (AntiVirScheduler) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: Avira AntiVir Personal - Free Antivirus Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\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: ATI Smart - Unknown owner - C:\WINDOWS\system32\ati2sgag.exe
O23 - Service: AVG Free8 E-mail Scanner (avg8emc) - AVG Technologies CZ, s.r.o. - C:\PROGRA~1\AVG\AVG8\avgemc.exe
O23 - Service: AVG Free8 WatchDog (avg8wd) - AVG Technologies CZ, s.r.o. - C:\PROGRA~1\AVG\AVG8\avgwdsvc.exe
O23 - Service: Bonjour Service - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: BrSplService (Brother XP spl Service) - brother Industries Ltd - C:\WINDOWS\system32\brsvc01a.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: McAfee Services (mcmscsvc) - McAfee, Inc. - C:\PROGRA~1\McAfee\MSC\mcmscsvc.exe
O23 - Service: McAfee Network Agent (McNASvc) - McAfee, Inc. - c:\program files\common files\mcafee\mna\mcnasvc.exe
O23 - Service: McAfee Scanner (McODS) - McAfee, Inc. - C:\PROGRA~1\McAfee\VIRUSS~1\mcods.exe
O23 - Service: McAfee Proxy Service (McProxy) - McAfee, Inc. - c:\PROGRA~1\COMMON~1\mcafee\mcproxy\mcproxy.exe
O23 - Service: McAfee Real-time Scanner (McShield) - McAfee, Inc. - C:\PROGRA~1\McAfee\VIRUSS~1\mcshield.exe
O23 - Service: McAfee SystemGuards (McSysmon) - McAfee, Inc. - C:\PROGRA~1\McAfee\VIRUSS~1\mcsysmon.exe
O23 - Service: McAfee Personal Firewall Service (MpfService) - McAfee, Inc. - C:\Program Files\McAfee\MPF\MPFSrv.exe
O23 - Service: PrismXL - New Boundary Technologies, Inc. - C:\Program Files\Common Files\New Boundary\PrismXL\PRISMXL.SYS
O23 - Service: Webroot Spy Sweeper Engine (WebrootSpySweeperService) - Webroot Software, Inc. (www.webroot.com) - C:\Program Files\Webroot\Spy Sweeper\SpySweeper.exe
O23 - Service: Window Washer Engine (wwEngineSvc) - Webroot Software, Inc. - C:\Program Files\Webroot\Washer\WasherSvc.exe