My computer acts strangely. Sometimes my anti virus software shuts down. Also sometimes my browser acts strangely and displays a strange looking not found page. Can someone look at this please?

Thank you:

Logfile of HijackThis v1.99.1
Scan saved at 12:41:07 AM, on 11/11/2006
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\csrss.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:\Program Files\iolo\System Mechanic 6\IoloSGCtrl.exe
C:\Program Files\Sunbelt Software\Personal Firewall\kpf4ss.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\wdfmgr.exe
C:\Program Files\Sunbelt Software\Personal Firewall\kpf4gui.exe
C:\Program Files\Sony\VAIO Event Service\VESMgr.exe
C:\Program Files\Common Files\Softwin\BitDefender Communicator\xcommsvr.exe
C:\Program Files\Sony\SmartWi Connection Utility\SmartWiService.exe
C:\Program Files\Sunbelt Software\CounterSpy\Consumer\sunThreatEngine.exe
C:\Program Files\Sunbelt Software\CounterSpy\Consumer\SunProtectionServer.exe
C:\Program Files\Sony\VAIO Power Management\SPMgr.exe
C:\Program Files\Sony\ISB Utility\ISBMgr.exe
C:\Program Files\Sony\SmartWi Connection Utility\WCULauncher.exe
C:\Program Files\Softwin\BitDefender10\bdmcon.exe
C:\Program Files\Softwin\BitDefender10\bdagent.exe
C:\Program Files\Apoint\Apoint.exe
C:\Program Files\Sunbelt Software\CounterSpy\Consumer\sunserver.exe
C:\Program Files\iolo\System Mechanic 6\SystemGuardAlerter.exe
C:\Program Files\iolo\System Mechanic 6\SMSystemAnalyzer.exe
C:\Program Files\Sony\SmartWi Connection Utility\SmartWiTogglet.exe
C:\Program Files\Apoint\Apntex.exe
C:\WINDOWS\system32\drwtsn32.exe
C:\WINDOWS\system32\drwtsn32.exe
C:\WINDOWS\Explorer.exe
C:\Program Files\Sunbelt Software\Personal Firewall\kpf4gui.exe
F:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Common Files\Softwin\BitDefender Update Service\livesrv.exe
C:\Program Files\Common Files\Softwin\BitDefender Scan Server\bdss.exe
C:\Program Files\Softwin\BitDefender10\vsserv.exe
F:\Program Files\hijackthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.sony.com/vaiopeople
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.sony.com/vaiopeople
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://www.sony.com/vaiopeople
O2 - BHO: (no name) - AutorunsDisabled - (no file)
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: (no name) - {E24AD748-155E-4254-B674-4EDF86E7E1DF} - (no file)
O4 - HKLM\..\Run: [SonyPowerCfg] C:\Program Files\Sony\VAIO Power Management\SPMgr.exe
O4 - HKLM\..\Run: [ISBMgr.exe] C:\Program Files\Sony\ISB Utility\ISBMgr.exe
O4 - HKLM\..\Run: [WCULauncher] C:\Program Files\Sony\SmartWi Connection Utility\WCULauncher.exe
O4 - HKLM\..\Run: [BDMCon] "C:\Program Files\Softwin\BitDefender10\bdmcon.exe" /reg
O4 - HKLM\..\Run: [BDAgent] "C:\Program Files\Softwin\BitDefender10\bdagent.exe"
O4 - HKLM\..\Run: [Apoint] C:\Program Files\Apoint\Apoint.exe
O4 - HKLM\..\Run: [SunServer] C:\Program Files\Sunbelt Software\CounterSpy\Consumer\sunserver.exe
O4 - HKLM\..\Run: [SystemGuardAlerter] SystemGuardAlerter.exe
O4 - HKLM\..\Run: [ioloDelayModule] C:\Program Files\iolo\System Mechanic 6\delay.exe
O4 - HKCU\..\Run: [SMSystemAnalyzer] "C:\Program Files\iolo\System Mechanic 6\SMSystemAnalyzer.exe"
O9 - Extra button: (no name) - AutorunsDisabled - (no file)
O14 - IERESET.INF: START_PAGE_URL=http://www.sony.com/vaiopeople
O16 - DPF: {215B8138-A3CF-44C5-803F-8226143CFC0A} (Trend Micro ActiveX Scan Agent 6.5) - http://housecall65.trendmicro.com/housecal…ivex/hcImpl.cab
O16 - DPF: {9A9307A0-7DA4-4DAF-B042-5009F29E09E1} (ActiveScan Installer Class) - http://acs.pandasoftware.com/activescan/as5free/asinst.cab
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxdev.dll
O20 - Winlogon Notify: psfus - C:\WINDOWS\SYSTEM32\fusstub.dll
O20 - Winlogon Notify: VESWinlogon - C:\WINDOWS\SYSTEM32\VESWinlogon.dll
O23 - Service: Adobe LM Service - Adobe Systems - C:\Program Files\Common Files\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: BitDefender Scan Server (bdss) - Unknown owner - C:\Program Files\Common Files\Softwin\BitDefender Scan Server\bdss.exe" /service (file missing)
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: iolo System Guard (IOLO_SRV) - Unknown owner - C:\Program Files\iolo\System Mechanic 6\IoloSGCtrl.exe
O23 - Service: Sunbelt Kerio Personal Firewall 4 (KPF4) - Sunbelt Software - C:\Program Files\Sunbelt Software\Personal Firewall\kpf4ss.exe
O23 - Service: BitDefender Desktop Update Service (LIVESRV) - Unknown owner - C:\Program Files\Common Files\Softwin\BitDefender Update Service\livesrv.exe" /service (file missing)
O23 - Service: MSCSPTISRV - Sony Corporation - C:\Program Files\Common Files\Sony Shared\AVLib\MSCSPTISRV.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: PACSPTISVR - Sony Corporation - C:\Program Files\Common Files\Sony Shared\AVLib\PACSPTISVR.exe
O23 - Service: SmartWiService - Sony Electronics, Inc - C:\Program Files\Sony\SmartWi Connection Utility\SmartWiService.exe
O23 - Service: Sony SPTI Service (SPTISRV) - Sony Corporation - C:\Program Files\Common Files\Sony Shared\AVLib\SPTISRV.exe
O23 - Service: VAIO Event Service - Sony Corporation - C:\Program Files\Sony\VAIO Event Service\VESMgr.exe
O23 - Service: BitDefender Virus Shield (VSSERV) - Unknown owner - C:\Program Files\Softwin\BitDefender10\vsserv.exe" /service (file missing)
O23 - Service: BitDefender Communicator (XCOMM) - Unknown owner - C:\Program Files\Common Files\Softwin\BitDefender Communicator\xcommsvr.exe" /service (file missing)