I'm having lots of problems and my antivirus (Spyware Doctor with Antivirus) isn't finding anything! Well it did say 4 ignored infections until Spyware Doctor personnel had me remove and reinstall SpywareDoctor with Antivirus, now it just says clean.

I tried downloading and installing AVG, and once I run the setup file, it tells me that the file is corrupt (tried this 2 times). SuperAntiSpyware shows clean result too.

I accidently clicked the wrong X button on a popunder and have had grief ever since!

Problems:

Sound started turning on and off repeatedly. Now there is no sound at all.
Computer shuts down randomly usually when the vertical scrollbar is used.
Icons in file folders (set to remember) are being scrambled.
I used to be able to open tables on a game site, now I get a hand icon and tables won't open.
Other programs are also behaving strangely, but the above items are the major problems

Here's the HijackThis log:

Logfile of Trend Micro HijackThis v2.0.0 (BETA)
Scan saved at 12:23:12 PM, on 12/12/2007
Platform: Windows Vista (WinNT 6.00.1904)
Boot mode: Normal

Running processes:
C:\Windows\System32\smss.exe
C:\Windows\system32\csrss.exe
C:\Windows\system32\wininit.exe
C:\Windows\system32\csrss.exe
C:\Windows\system32\services.exe
C:\Windows\system32\lsass.exe
C:\Windows\system32\lsm.exe
C:\Windows\system32\winlogon.exe
C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe
C:\Windows\System32\svchost.exe
C:\Windows\system32\Ati2evxx.exe
C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe
C:\Windows\system32\svchost.exe
C:\Windows\system32\SLsvc.exe
C:\Windows\system32\svchost.exe
C:\Windows\system32\Ati2evxx.exe
C:\Windows\system32\svchost.exe
C:\Windows\System32\LEXBCES.EXE
C:\Windows\System32\LEXPPS.EXE
C:\Windows\System32\spoolsv.exe
C:\Windows\system32\svchost.exe
C:\Windows\system32\Dwm.exe
C:\Windows\system32\taskeng.exe
C:\Windows\Explorer.EXE
C:\Windows\RtHDVCpl.exe
C:\Program Files\Lexmark 4200 Series\LXBMmon.exe
E:\Program Files\Spyware Doctor\SDTrayApp.exe
C:\Program Files\Windows Media Player\wmpnscfg.exe
C:\Program Files\Windows Sidebar\sidebar.exe
E:\Program Files\Mystic Island\Keyboard Express 3\keyexp.exe
E:\Program Files\Pagoo\Pagoo.exe
C:\Program Files\PeoplePC\ISP6630\Browser\Bartshel.exe
C:\Program Files\PeoplePC\ISP6630\Browser\PPShared.exe
C:\Windows\system32\lxbmcoms.exe
C:\Program Files\Common Files\Microsoft Shared\VS7Debug\mdm.exe
C:\Windows\system32\svchost.exe
e:\Program Files\Spyware Doctor\svcntaux.exe
e:\Program Files\Spyware Doctor\swdsvc.exe
C:\Windows\system32\svchost.exe
C:\Windows\System32\svchost.exe
C:\Windows\system32\SearchIndexer.exe
C:\Windows\system32\DRIVERS\xaudio.exe
C:\Program Files\PeoplePC\ISP6630\Browser\Bartshel.exe
C:\Program Files\Windows Media Player\wmpnetwk.exe
E:\Program Files\Mozilla Firefox\firefox.exe
C:\Windows\system32\taskeng.exe
C:\Windows\system32\wuauclt.exe
C:\Windows\system32\taskmgr.exe
C:\Windows\system32\taskeng.exe
C:\Windows\system32\wbem\wmiprvse.exe
F:\Downloads\HiJackThis_v2.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://home.peoplepc.com/search
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://us.rd.yahoo.com/customize/ie/defaul...//www.yahoo.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.yahoo.com/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://us.rd.yahoo.com/customize/ie/defaul...//www.yahoo.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://us.rd.yahoo.com/customize/ie/defaul...rch/search.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://us.rd.yahoo.com/customize/ie/defaul...//www.yahoo.com
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.yahoo.com/
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://home.peoplepc.com/search
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://us.rd.yahoo.com/customize/ie/defaul...//www.yahoo.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRA~1\Yahoo!\Companion\Installs\cpn\yt.dll
O1 - Hosts: ::1 localhost
O2 - BHO: EarthLink BHO Guard - {00000000-0000-0000-0000-000000000002} - C:\Program Files\PeoplePC\Toolbar\ScamGrd.dll
O2 - BHO: &Yahoo! Toolbar Helper - {02478D38-C3F9-4efb-9B51-7695ECA05670} - C:\PROGRA~1\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: EarthLink ScamBlocker V3 - {15F4D456-5BAA-4076-8486-EECB38CD3E57} - C:\Program Files\PeoplePC\Toolbar\ScamGrd.dll
O2 - BHO: Watch for Browser Events - {42A7CE31-CEE7-4CCE-A060-A44A7E52E062} - E:\PROGRA~1\MYSTIC~1\KEYBOA~1\kie.dll
O2 - BHO: Accelerator Plugin - {656EC4B7-072B-4698-B504-2A414C1F0037} - C:\PROGRA~1\PEOPLE~1\PRPL_I~1.DLL
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0\bin\ssv.dll
O2 - BHO: PeoplePal Toolbar - {A8FB8EB3-183B-4598-924D-86F0E5E37085} - C:\Program Files\PeoplePC\Toolbar\PPCToolbar.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRA~1\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: PeoplePal Toolbar - {A8FB8EB3-183B-4598-924D-86F0E5E37085} - C:\Program Files\PeoplePC\Toolbar\PPCToolbar.dll
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0\bin\jusched.exe"
O4 - HKLM\..\Run: [RtHDVCpl] RtHDVCpl.exe
O4 - HKLM\..\Run: [lxbmmon.exe] "C:\Program Files\Lexmark 4200 Series\lxbmmon.exe"
O4 - HKLM\..\Run: [Lexmark 4200 Series Fax Server] "C:\Program Files\Lexmark 4200 Series\fm3032.exe" /s
O4 - HKLM\..\Run: [Lexmark 4200 Series] "C:\Program Files\Lexmark 4200 Series\lxbmbmgr.exe"
O4 - HKLM\..\Run: [CorelDRAW Graphics Suite 11b] C:\Program Files\Corel\Corel Graphics 12\Languages\EN\Programs\Registration.exe /title="CorelDRAW Graphics Suite 12" /date=121807 serial=DR12WCX-1216139-DBY lang=EN
O4 - HKLM\..\Run: [Bart Station] C:\Program Files\PeoplePC\ISP6630\BIN\PPCOLink.exe -STATION
O4 - HKLM\..\Run: [SDTray] "e:\Program Files\Spyware Doctor\SDTrayApp.exe"
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
O4 - HKCU\..\Run: [Sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun
O4 - HKUS\S-1-5-19\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-19\..\Run: [WindowsWelcomeCenter] rundll32.exe oobefldr.dll,ShowWelcomeCenter (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'NETWORK SERVICE')
O4 - Startup: Pagoo.lnk = E:\Program Files\Pagoo\Pagoo.exe
O4 - Global Startup: Keyboard Express 3.lnk = E:\Program Files\Mystic Island\Keyboard Express 3\keyexp.exe
O4 - Global Startup: Microsoft Office.lnk = C:\Program Files\Microsoft Office\Office10\OSA.EXE
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Open Picture in &Microsoft PhotoDraw - res://C:\PROGRA~1\MICROS~2\Office\1033\phdintl.dll/phdContext.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0\bin\ssv.dll
O9 - Extra button: PalTalk - {4EAFEF58-EEFA-4116-983D-03B49BCBFFFE} - e:\Program Files\Paltalk Messenger\Paltalk.exe
O9 - Extra button: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - H:\PROGRA~1\YAHOO!\MESSEN~1\YPAGER.EXE (file missing)
O9 - Extra 'Tools' menuitem: Yahoo! Messenger - {E5D12C4E-7B4F-11D3-B5C9-0050045C3C96} - H:\PROGRA~1\YAHOO!\MESSEN~1\YPAGER.EXE (file missing)
O13 - Gopher Prefix:
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - H:\Program Files\Yahoo!\Common\yinsthelper.dll
O17 - HKLM\System\CCS\Services\Tcpip\..\{B9C08460-20CF-4A99-B7A0-BFDE98A981A2}: NameServer = 209.244.0.3 209.244.0.4
O20 - Winlogon Notify: !SASWinLogon - H:\Program Files\SUPERAntiSpyware\SASWINLO.dll
O22 - SharedTaskScheduler: Component Categories cache daemon - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\Windows\system32\browseui.dll
O23 - Service: Ati External Event Utility - ATI Technologies Inc. - C:\Windows\system32\Ati2evxx.exe
O23 - Service: BRS WebWeaver (BRS_WebWeaver) - Unknown owner - E:\Program Files\WebWeaver\WebWeaver.exe (file missing)
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\Windows\System32\LEXBCES.EXE
O23 - Service: lxbm_device - - C:\Windows\system32\lxbmcoms.exe
O23 - Service: PC Tools Auxiliary Service (sdAuxService) - PC Tools - e:\Program Files\Spyware Doctor\svcntaux.exe
O23 - Service: PC Tools Security Service (sdCoreService) - PC Tools - e:\Program Files\Spyware Doctor\swdsvc.exe
O23 - Service: XAudioService - Conexant Systems, Inc. - C:\Windows\system32\DRIVERS\xaudio.exe

--
End of file - 8469 bytes

Please let me know if I need to run or post anything else.