Slow running computer, same popups opening at random times

My computer has recently started running slowly and the same popup keeps coming up at random times, such as when I close an unrelated program. Logfile of Trend Micro HijackThis v2.0.2 Scan saved at 5:36:48 PM, on 1/9/2008 Platform: Windows XP SP2 (WinNT 5.01.2600) MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180) 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:\Program Files\Common Files\Symantec Shared\ccSetMgr.exe C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe C:\Program Files\Common Files\Symantec Shared\ccProxy.exe C:\Program Files\Common Files\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe C:\Program Files\Common Files\Symantec Shared\SNDSrvc.exe C:\Program Files\Common Files\Symantec Shared\SPBBC\SPBBCSvc.exe C:\Program Files\Common Files\Symantec Shared\CCPD-LC\symlcsvc.exe C:\WINDOWS\Explorer.EXE C:\WINDOWS\System32\WLTRYSVC.EXE C:\WINDOWS\System32\bcmwltry.exe C:\WINDOWS\system32\spoolsv.exe c:\program files\common files\logitech\lvmvfm\LVPrcSrv.exe C:\Program Files\Symantec\LiveUpdate\ALUSchedulerSvc.exe C:\Program Files\Common Files\Microsoft Shared\VS7DEBUG\MDM.EXE C:\Program Files\Microsoft SQL Server\MSSQL$MICROSOFTSMLBIZ\Binn\sqlservr.exe C:\Program Files\Norton Internet Security\Norton AntiVirus\navapsvc.exe C:\Program Files\Dell\QuickSet\NICCONFIGSVC.exe C:\WINDOWS\system32\svchost.exe C:\Program Files\Viewpoint\Common\ViewpointService.exe C:\Program Files\ATI Technologies\ATI.ACE\CLI.EXE C:\Program Files\Synaptics\SynTP\SynTPEnh.exe C:\Program Files\Dell\QuickSet\quickset.exe C:\WINDOWS\system32\WLTRAY.exe C:\WINDOWS\stsystra.exe C:\Program Files\CyberLink\PowerDVD\DVDLauncher.exe C:\Program Files\Common Files\Symantec Shared\ccApp.exe C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe C:\Program Files\Common Files\Logitech\LComMgr\Communications_Helper.exe C:\Program Files\Logitech\QuickCam10\QuickCam10.exe C:\Program Files\Common Files\Logitech\LComMgr\LVComSX.exe C:\Program Files\Common Files\Real\Update_OB\realsched.exe C:\Program Files\NetWaiting\netWaiting.exe C:\Program Files\Dell Support\DSAgnt.exe C:\WINDOWS\System32\svchost.exe C:\WINDOWS\system32\ctfmon.exe C:\Program Files\Google\Google Desktop Search\GoogleDesktopIndex.exe C:\Program Files\Skype\Phone\Skype.exe C:\Program Files\AIM\aim.exe C:\Program Files\Digital Line Detect\DLG.exe C:\Program Files\Microsoft SQL Server\80\Tools\Binn\sqlmangr.exe C:\Program Files\Expedia\Expedia Fare Alert\ExpediaFareAlert.exe C:\Program Files\Viewpoint\Viewpoint Manager\ViewMgr.exe C:\Program Files\Common Files\Logishrd\LQCVFX\COCIManager.exe C:\WINDOWS\system32\wbem\wmiapsrv.exe C:\Program Files\Common Files\Symantec Shared\Security Console\NSCSRVCE.EXE C:\Program Files\ATI Technologies\ATI.ACE\cli.exe C:\Program Files\LimeWire\LimeWire.exe C:\Program Files\Trend Micro\HijackThis\HijackThis.exe C:\PROGRA~1\MOZILL~1\FIREFOX.EXE C:\Program Files\Messenger\msmsgs.exe R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = www.google.com/ig/dell?hl=en&client=dell-usuk-rel&channel=us&ibd=0070105 R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.dell.com R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.dell.com R1 - HKLM\Software\Microsoft\Internet Explorer\Search,Default_Page_URL = www.google.com/ig/dell?hl=en&client=dell-usuk-rel&channel=us&ibd=0070105 R3 - URLSearchHook: AOLTBSearch Class - {EA756889-2338-43DB-8F07-D1CA6FB9C90D} - C:\Program Files\AOL\AOL Toolbar 4.0\aoltb.dll O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll O2 - BHO: AOL Toolbar Launcher - {7C554162-8CB7-45A4-B8F4-8EA1C75885F9} - C:\Program Files\AOL\AOL Toolbar 4.0\aoltb.dll O2 - BHO: browser optimizer superiorads - {8E015787-B1E3-404a-95DE-3E71E1FA0305} - C:\WINDOWS\system32\spads.dll O2 - BHO: Norton Internet Security 2006 - {9ECB9560-04F9-4bbc-943D-298DDF1699E1} - C:\Program Files\Common Files\Symantec Shared\AdBlocking\NISShExt.dll O2 - BHO: NAV Helper - {A8F38D8D-E480-4D52-B7A2-731BB6995FDD} - C:\Program Files\Norton Internet Security\Norton AntiVirus\NavShExt.dll O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar2.dll O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\2.0.1121.2472\swg.dll O3 - Toolbar: Norton AntiVirus - {C4069E3A-68F1-403E-B40E-20066696354B} - C:\Program Files\Norton Internet Security\Norton AntiVirus\NavShExt.dll O3 - Toolbar: AOL Toolbar - {DE9C389F-3316-41A7-809B-AA305ED9D922} - C:\Program Files\AOL\AOL Toolbar 4.0\aoltb.dll O3 - Toolbar: Norton Internet Security 2006 - {0B53EAC3-8D69-4b9e-9B19-A37C9A5676A7} - C:\Program Files\Common Files\Symantec Shared\AdBlocking\NISShExt.dll O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar2.dll O4 - HKLM\..\Run: [ATICCC] "C:\Program Files\ATI Technologies\ATI.ACE\CLIStart.exe" O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe O4 - HKLM\..\Run: [Dell QuickSet] C:\Program Files\Dell\QuickSet\quickset.exe O4 - HKLM\..\Run: [Broadcom Wireless Manager UI] C:\WINDOWS\system32\WLTRAY.exe O4 - HKLM\..\Run: [SigmatelSysTrayApp] stsystra.exe O4 - HKLM\..\Run: [DVDLauncher] "C:\Program Files\CyberLink\PowerDVD\DVDLauncher.exe" O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Common Files\Symantec Shared\ccApp.exe" O4 - HKLM\..\Run: [URLLSTCK.exe] C:\Program Files\Norton Internet Security\UrlLstCk.exe O4 - HKLM\..\Run: [Google Desktop Search] "C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe" /startup O4 - HKLM\..\Run: [LogitechCommunicationsManager] "C:\Program Files\Common Files\Logitech\LComMgr\Communications_Helper.exe" O4 - HKLM\..\Run: [LogitechQuickCamRibbon] "C:\Program Files\Logitech\QuickCam10\QuickCam10.exe" /hide O4 - HKLM\..\Run: [LVCOMSX] "C:\Program Files\Common Files\Logitech\LComMgr\LVComSX.exe" O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot O4 - HKLM\..\Run: [Symantec PIF AlertEng] "C:\Program Files\Common Files\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe" /a /m "C:\Program Files\Common Files\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\AlertEng.dll" O4 - HKLM\..\Run: [spa_start] C:\WINDOWS\System32\Rundll32.exe "C:\WINDOWS\system32\spads.dll" DllVerify O4 - HKCU\..\Run: [ModemOnHold] C:\Program Files\NetWaiting\netWaiting.exe O4 - HKCU\..\Run: [DellSupport] "C:\Program Files\Dell Support\DSAgnt.exe" /startup O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe O4 - HKCU\..\Run: [Skype] "C:\Program Files\Skype\Phone\Skype.exe" /nosplash /minimized O4 - HKCU\..\Run: [AIM] C:\Program Files\AIM\aim.exe -cnetwait.odl O4 - HKCU\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe O4 - Startup: Expedia Fare Alert.lnk = C:\Program Files\Expedia\Expedia Fare Alert\ExpediaFareAlert.exe O4 - Global Startup: Adobe Reader Speed Launch.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe O4 - Global Startup: Digital Line Detect.lnk = ? O4 - Global Startup: Service Manager.lnk = C:\Program Files\Microsoft SQL Server\80\Tools\Binn\sqlmangr.exe O8 - Extra context menu item: &AOL Toolbar Search - c:\program files\aol\aol toolbar 4.0\resources\en-US\local\search.html O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MI1933~1\OFFICE11\EXCEL.EXE/3000 O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_06\bin\ssv.dll O9 - Extra button: AOL Toolbar - {3369AF0D-62E9-4bda-8103-B4C75499B578} - C:\Program Files\AOL\AOL Toolbar 4.0\aoltb.dll O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MI1933~1\OFFICE11\REFIEBAR.DLL O9 - Extra button: AIM - {AC9E2541-2814-11d5-BC6D-00B0D0A1DE45} - C:\Program Files\AIM\aim.exe O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\system32\Shdocvw.dll 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: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL O20 - AppInit_DLLs: C:\PROGRA~1\Google\GOOGLE~1\GOEC62~1.DLL 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: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe O23 - Service: Symantec Internet Security Password Validation (ccISPwdSvc) - Symantec Corporation - C:\Program Files\Norton Internet Security\ccPwdSvc.exe O23 - Service: Symantec Network Proxy (ccProxy) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccProxy.exe O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccSetMgr.exe O23 - Service: COM Host (comHost) - Symantec Corporation - C:\Program Files\Norton Internet Security\comHost.exe O23 - Service: GoogleDesktopManager - Google - C:\Program Files\Google\Google Desktop Search\GoogleDesktopManager.exe O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe O23 - Service: LiveUpdate - Symantec Corporation - C:\PROGRA~1\Symantec\LIVEUP~1\LUCOMS~1.EXE O23 - Service: LiveUpdate Notice Service - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe O23 - Service: Process Monitor (LVPrcSrv) - Logitech Inc. - c:\program files\common files\logitech\lvmvfm\LVPrcSrv.exe O23 - Service: LVSrvLauncher - Logitech Inc. - C:\Program Files\Common Files\Logitech\SrvLnch\SrvLnch.exe O23 - Service: Norton AntiVirus Auto-Protect Service (navapsvc) - Symantec Corporation - C:\Program Files\Norton Internet Security\Norton AntiVirus\navapsvc.exe O23 - Service: NICCONFIGSVC - Dell Inc. - C:\Program Files\Dell\QuickSet\NICCONFIGSVC.exe O23 - Service: Norton Protection Center Service (NSCService) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\Security Console\NSCSRVCE.EXE O23 - Service: Symantec AVScan (SAVScan) - Symantec Corporation - C:\Program Files\Norton Internet Security\Norton AntiVirus\SAVScan.exe O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\SNDSrvc.exe O23 - Service: Symantec SPBBCSvc (SPBBCSvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\SPBBC\SPBBCSvc.exe O23 - Service: Symantec Core LC - Unknown owner - C:\Program Files\Common Files\Symantec Shared\CCPD-LC\symlcsvc.exe O23 - Service: Viewpoint Manager Service - Viewpoint Corporation - C:\Program Files\Viewpoint\Common\ViewpointService.exe O23 - Service: Dell Wireless WLAN Tray Service (wltrysvc) - Unknown owner - C:\WINDOWS\System32\WLTRYSVC.EXE -- End of file - 11859 bytes