Janelas fechando sozinho.

Olá pessoal,
estou com problemas aqui no meu pc.
janelas estão fechando sozinhas, tipo jogos fecham sozinho , IE, e msn ,
queria contar com ajuda de vocês para resolver este problema.
acredito que seja vírus mais aqui o Avira nao detectou nada.
o log é esse abaixo .

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 14:56:08, on 31/10/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
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\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Arquivos de programas\Avira\AntiVir Desktop\sched.exe
C:\WINDOWS\Explorer.EXE
C:\Arquivos de programas\Avira\AntiVir Desktop\avguard.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\WINDOWS\vsnpstd2.exe
C:\Arquivos de programas\Java\jre6\bin\jqs.exe
C:\Arquivos de programas\Avira\AntiVir Desktop\avgnt.exe
C:\Arquivos de programas\Java\jre6\bin\jusched.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\Arquivos de programas\Spyware Terminator\sp_rsser.exe
C:\Arquivos de programas\Arquivos comuns\Real\Update_OB\realsched.exe
C:\WINDOWS\system32\svchost.exe
C:\Arquivos de programas\Adobe\Photoshop Album Starter Edition\3.2\Apps\apdproxy.exe
C:\Arquivos de programas\Spyware Terminator\SpywareTerminatorShield.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Documents and Settings\Administrador\Meus documentos\Estevan\Sony Ericsson PC Suite\SEPCSuite.exe
C:\ARQUIV~1\SPYWAR~1\SpywareTerminatorUpdate.exe
C:\Arquivos de programas\Pando Networks\Media Booster\PMB.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\WINDOWS\system32\wscntfy.exe
C:\WINDOWS\System32\svchost.exe
C:\Arquivos de programas\Windows Live\Messenger\msnmsgr.exe
C:\Arquivos de programas\Windows Live\Contacts\wlcomm.exe
C:\Arquivos de programas\Internet Explorer\iexplore.exe
C:\Arquivos de programas\Internet Explorer\iexplore.exe
C:\Arquivos de programas\Internet Explorer\iexplore.exe
C:\Arquivos de programas\Internet Explorer\iexplore.exe
C:\Arquivos de programas\Internet Explorer\iexplore.exe
C:\Arquivos de programas\WinRAR\WinRAR.exe
C:\DOCUME~1\ADMINI~1\CONFIG~1\Temp\Rar$EX00.735\HijackThis.exe
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://br.msn.com/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.uol.com.br/
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://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://go.microsoft.com/fwlink/?LinkId=74005
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,AutoConfigURL = http://69.65.53.243/MicrosoftSecurityBrowser.bin
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Arquivos de programas\Arquivos comuns\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: RealPlayer Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - C:\Arquivos de programas\Real\RealPlayer\rpbrowserrecordplugin.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Auxiliar de Conexão do Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Arquivos de programas\Arquivos comuns\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Arquivos de programas\Java\jre6\bin\jp2ssv.dll
O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Arquivos de programas\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [snpstd2] C:\WINDOWS\vsnpstd2.exe
O4 - HKLM\..\Run: [avgnt] "C:\Arquivos de programas\Avira\AntiVir Desktop\avgnt.exe" /min
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Arquivos de programas\Java\jre6\bin\jusched.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Arquivos de programas\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [TkBellExe] "C:\Arquivos de programas\Arquivos comuns\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [QuickTime Task] "C:\Arquivos de programas\qttask.exe" -atboottime
O4 - HKLM\..\Run: [Adobe Photo Downloader] "C:\Arquivos de programas\Adobe\Photoshop Album Starter Edition\3.2\Apps\apdproxy.exe"
O4 - HKLM\..\Run: [SpywareTerminator] "C:\Arquivos de programas\Spyware Terminator\SpywareTerminatorShield.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [NBJ] "C:\Arquivos de programas\Ahead\Nero BackItUp\NBJ.exe"
O4 - HKCU\..\Run: [Sony Ericsson PC Suite] "C:\Documents and Settings\Administrador\Meus documentos\Estevan\Sony Ericsson PC Suite\SEPCSuite.exe" /systray /nologon
O4 - HKCU\..\Run: [SpywareTerminatorUpdate] "C:\ARQUIV~1\SPYWAR~1\SpywareTerminatorUpdate.exe"
O4 - HKCU\..\Run: [Pando Media Booster] C:\Arquivos de programas\Pando Networks\Media Booster\PMB.exe
O4 - HKUS\S-1-5-18\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'Default user')
O16 - DPF: {0CCA191D-13A6-4E29-B746-314DEE697D83} (Facebook Photo Uploader 5 Control) - http://upload.facebook.com/controls/2008.10.10_v5.5.8/FacebookPhotoUploader5.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
O23 - Service: Avira AntiVir Scheduler (AntiVirSchedulerService) - Avira GmbH - C:\Arquivos de programas\Avira\AntiVir Desktop\sched.exe
O23 - Service: Avira AntiVir Guard (AntiVirService) - Avira GmbH - C:\Arquivos de programas\Avira\AntiVir Desktop\avguard.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Arquivos de programas\Java\jre6\bin\jqs.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Spyware Terminator Realtime Shield Service (sp_rssrv) - Crawler.com - C:\Arquivos de programas\Spyware Terminator\sp_rsser.exe
--
End of file - 6747 bytes

abraço!