Computer running slower than usual; graphics & processor suffering

Hey there. I usually get around 15 mbps for my download internet speed, but this computer keeps getting 5 mbps or lower. Graphics are suffering, pushing out 20 fps and crashing for little issues with game graphics, even at the lowest settings. I'm under the impression some sort of malware, spyware, or virus is preventing my processor or graphics card to work or perform properly. My computer is running Windows XP SP3 Media Center Edition. Intel Pentium D 2.80 GHz processor; 2 GB of RAM. Here's my hijackthis log. Thank you!

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Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 10:13:35 PM, on 1/20/2010
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512)
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\Common Files\Symantec Shared\ccSetMgr.exe
C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Symantec AntiVirus\DefWatch.exe
C:\WINDOWS\eHome\ehRecvr.exe
C:\WINDOWS\eHome\ehSched.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\Program Files\Common Files\Microsoft Shared\VS7Debug\mdm.exe
C:\WINDOWS\system32\PRISMSVC.EXE
C:\WINDOWS\system32\PSIService.exe
C:\Program Files\Microsoft Application Virtualization Client\sftvsa.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Symantec AntiVirus\Rtvscan.exe
C:\Program Files\Viewpoint\Common\ViewpointService.exe
C:\Program Files\Compact Wireless-G USB Adapter Wireless Network Monitor\WLService.exe
C:\Program Files\Microsoft Application Virtualization Client\sftlist.exe
C:\Program Files\Common Files\Microsoft Shared\Virtualization Handler\CVHSVC.EXE
C:\WINDOWS\system32\dllhost.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Compact Wireless-G USB Adapter Wireless Network Monitor\WUSB54GC.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\PRISMSVR.EXE
C:\WINDOWS\system32\wuauclt.exe
C:\WINDOWS\ehome\ehtray.exe
C:\WINDOWS\stsystra.exe
C:\WINDOWS\system32\ICO.EXE
C:\WINDOWS\system32\dla\tfswctrl.exe
C:\Program Files\Creative\Mixer\CTSVolFE.exe
C:\Program Files\Common Files\Symantec Shared\ccApp.exe
C:\PROGRA~1\SYMANT~1\VPTray.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.exe
C:\Program Files\Corel\Corel Paint Shop Pro Photo X2\CorelIOMonitor.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\Electronic Arts\EADM\Core.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\ccc.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpobnz08.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpotdd01.exe
C:\WINDOWS\eHome\ehmsas.exe
C:\Program Files\WinZip\WZQKPICK.EXE
C:\Program Files\Dell Wireless\PRISMCFG.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpoevm08.exe
C:\Program Files\Hewlett-Packard\Digital Imaging\Bin\hpoSTS08.exe
C:\Program Files\Steam\Steam.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Spybot - Search & Destroy\SpybotSD.exe
C:\Program Files\Malwarebytes' Anti-Malware\mbam.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: DriveLetterAccess - {5CA3D70E-1895-11CF-8E15-001234567890} - C:\WINDOWS\system32\dla\tfswshx.dll
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: Java(tm) 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
O4 - HKLM\..\Run: [ehTray] C:\WINDOWS\ehome\ehtray.exe
O4 - HKLM\..\Run: [ATIPTA] "C:\Program Files\ATI Technologies\ATI Control Panel\atiptaxx.exe"
O4 - HKLM\..\Run: [SigmatelSysTrayApp] stsystra.exe
O4 - HKLM\..\Run: [PMX Daemon] ICO.EXE
O4 - HKLM\..\Run: [dla] C:\WINDOWS\system32\dla\tfswctrl.exe
O4 - HKLM\..\Run: [CTSVolFE] "C:\Program Files\Creative\Mixer\CTSVolFE.exe" /r
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [UpdateManager] "C:\Program Files\Common Files\Sonic\Update Manager\sgtray.exe" /r
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Common Files\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [vptray] C:\PROGRA~1\SYMANT~1\VPTray.exe
O4 - HKLM\..\Run: [StartCCC] "C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe" MSRun
O4 - HKLM\..\Run: [Corel Photo Downloader] "C:\Program Files\Common Files\Corel\Corel PhotoDownloader\Corel PhotoDownloader.exe" -startup
O4 - HKLM\..\Run: [Corel File Shell Monitor] C:\Program Files\Corel\Corel Paint Shop Pro Photo X2\CorelIOMonitor.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [Malwarebytes Anti-Malware (reboot)] "C:\Program Files\Malwarebytes' Anti-Malware\mbam.exe" /runcleanupscript
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\QTTask.exe" -atboottime
O4 - HKCU\..\Run: [EA Core] "C:\Program Files\Electronic Arts\EADM\Core.exe" -silent
O4 - HKCU\..\Run: [Steam] "c:\program files\steam\steam.exe" -silent
O4 - HKCU\..\Run: [uTorrent] "C:\Program Files\uTorrent\uTorrent.exe"
O4 - HKCU\..\Run: [Wootalyzer] "C:\Program Files\Wootalyzer\woot.exe" /boot
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\Windows Live\Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [Aim] "C:\Program Files\AIM\aim.exe" /d locale=en-US
O4 - Startup: Stardock ObjectDock.lnk = C:\Program Files\Stardock\ObjectDock\ObjectDock.exe
O4 - Global Startup: hp psc 2000 Series.lnk = C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpobnz08.exe
O4 - Global Startup: hpoddt01.exe.lnk = ?
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O4 - Global Startup: WinZip Quick Pick.lnk = C:\Program Files\WinZip\WZQKPICK.EXE
O4 - Global Startup: Wireless USB 2.0 WLAN Card Utility.lnk = ?
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe (file missing)
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe (file missing)
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: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1238711780981
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: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccEvtMgr.exe
O23 - Service: Symantec Password Validation (ccPwdSvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccPwdSvc.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\ccSetMgr.exe
O23 - Service: Symantec AntiVirus Definition Watcher (DefWatch) - Symantec Corporation - C:\Program Files\Symantec AntiVirus\DefWatch.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: PRISMSVC - Conexant Systems, Inc. - C:\WINDOWS\system32\PRISMSVC.EXE
O23 - Service: ProtexisLicensing - Unknown owner - C:\WINDOWS\system32\PSIService.exe
O23 - Service: SAVRoam (SavRoam) - symantec - C:\Program Files\Symantec AntiVirus\SavRoam.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\SNDSrvc.exe
O23 - Service: Symantec AntiVirus - Symantec Corporation - C:\Program Files\Symantec AntiVirus\Rtvscan.exe
O23 - Service: Viewpoint Manager Service - Viewpoint Corporation - C:\Program Files\Viewpoint\Common\ViewpointService.exe
O23 - Service: WUSB54GCSVC - GEMTEKS - C:\Program Files\Compact Wireless-G USB Adapter Wireless Network Monitor\WLService.exe

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