System Security Virus?

Yesterday Internet Explorer 8 began intermittently closing down while surfing the web and a dialogue box came up telling me my computer was infected. An antivirus program immediately began running and I immediately closed it. Today, the same thing happened again. All my software is updated. I have run a scan with McAfee, Lavasoft, and Malwarebytes but nothing has been found. I do believe I have been infected with the System Security virus. I have posted my HiJack This log below. At present I have been unable to find any unusual processes running in the Task Manager. Also, unlike some folks affected by this virus, I am able to run my antimalware programs. Nonetheless, I wish to make sure my computer is safe and also don't want to be interrupted again while surfing.
Thanks for any assistance.

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 9:04:21 PM, on 2/19/2010
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\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Motherboard Monitor 5\MBM5.EXE
C:\Program Files\Logitech\MouseWare\system\em_exec.exe
C:\Program Files\Hewlett-Packard\HP Software Update\HPWuSchd.exe
C:\Program Files\HP\hpcoretech\hpcmpmgr.exe
C:\Program Files\Common Files\Java\Java Update\jusched.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\Program Files\Windows Media Player\WMPNSCFG.exe
C:\Program Files\APC\APC PowerChute Personal Edition\mainserv.exe
C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\WINDOWS\System32\svchost.exe
C:\PROGRA~1\Iomega\System32\AppServices.exe
C:\Program Files\Java\jre6\bin\jqs.exe
C:\PROGRA~1\McAfee\MSC\mcmscsvc.exe
c:\PROGRA~1\COMMON~1\mcafee\mna\mcnasvc.exe
C:\Program Files\APC\APC PowerChute Personal Edition\apcsystray.exe
c:\PROGRA~1\COMMON~1\mcafee\mcproxy\mcproxy.exe
C:\PROGRA~1\McAfee\VIRUSS~1\mcshield.exe
C:\Program Files\McAfee\MPF\MPFSrv.exe
C:\Program Files\Raxco\PerfectDisk\PDAgent.exe
C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe
C:\Program Files\UPHClean\uphclean.exe
C:\WINDOWS\System32\ups.exe
C:\Program Files\Iomega\AutoDisk\ADService.exe
c:\PROGRA~1\mcafee.com\agent\mcagent.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\PROGRA~1\McAfee\VIRUSS~1\mcsysmon.exe
C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\HPZSTC09.exe
D:\Downloads1\Trend Micro\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.bing.com/
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 Explorer\SearchURL,(Default) = http://search.yahoo.com/search?fr=mcafee&p=%s
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Browser Defender BHO - {2A0F3D1B-0909-4FF4-B272-609CCE6054E7} - C:\Program Files\Spyware Doctor\BDT\PCTBrowserDefender.dll (file missing)
O2 - BHO: scriptproxy - {7DB2D5A0-7241-4E79-B68D-6309F01C5231} - C:\Program Files\McAfee\VirusScan\scriptsn.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
O3 - Toolbar: (no name) - {381FFDE8-2394-4f90-B10D-FC6124A40F8C} - (no file)
O3 - Toolbar: PC Tools Browser Guard - {472734EA-242A-422B-ADF8-83D1E48CC825} - C:\Program Files\Spyware Doctor\BDT\PCTBrowserDefender.dll (file missing)
O4 - HKLM\..\Run: [MBM 5] "C:\Program Files\Motherboard Monitor 5\MBM5.EXE"
O4 - HKLM\..\Run: [Logitech Utility] Logi_MwX.Exe
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\system32\spool\drivers\w32x86\3\hpztsb09.exe
O4 - HKLM\..\Run: [HP Software Update] "C:\Program Files\Hewlett-Packard\HP Software Update\HPWuSchd.exe"
O4 - HKLM\..\Run: [HP Component Manager] "C:\Program Files\HP\hpcoretech\hpcmpmgr.exe"
O4 - HKLM\..\Run: [Ad-Watch] C:\Program Files\Lavasoft\Ad-Aware\AAWTray.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Common Files\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
O4 - Global Startup: APC UPS Status.lnk = ?
O9 - Extra button: Researcher - {9455301C-CF6B-11D3-A266-00C04F689C50} - C:\Program Files\Common Files\Microsoft Shared\Encarta Researcher\EROProj.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
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
O15 - Trusted Zone: http://*.download.microsoft.com
O15 - Trusted Zone: http://*.mcafee.com
O15 - Trusted Zone: http://*.update.microsoft.com
O15 - Trusted Zone: http://*.windowsupdate.com
O15 - Trusted Zone: http://*.windowsupdate.microsoft.com
O16 - DPF: {11260943-421B-11D0-8EAC-0000C07D88CF} (iPIX ActiveX Control) - http://www.ipix.com/download/ipixx.cab
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=36467&clcid=0x409
O16 - DPF: {4CCA4E6B-9259-11D9-AC6E-444553544200} (FixController Control) - http://h30155.www3.hp.com/ediags/dd/install/HPInstallMgr_v01.cab
O16 - DPF: {4ED9DDF0-7479-4BBE-9335-5A1EDB1D8A21} -
O16 - DPF: {54BE6B6F-3056-470B-97E1-BB92E051B6C4} (DeviceEnum Class) - http://h30155.www3.hp.com/ediags/dd/install/HPDriverDiagnosticsxp2k.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1228868752196
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://www.update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1254605373859
O16 - DPF: {A9F8D9EC-3D0A-4A60-BD82-FBD64BAD370D} (DDRevision Class) - http://h20264.www2.hp.com/ediags/dd/install/HPDriverDiagnosticsxp2k.cab
O16 - DPF: {BCC0FF27-31D9-4614-A68E-C18E1ADA4389} - http://download.mcafee.com/molbin/shared/mcgdmgr/1,0,0,26/mcgdmgr.cab
O16 - DPF: {E2883E8F-472F-4FB0-9522-AC9BF37916A7} - http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.cab
O16 - DPF: {F461205D-ABDC-42FE-B2E2-AFD4600B905E} (MASHControl Class) - http://www.amiuptodate.com/vsc/mvt/bin/1,0,0,7/mash.cab
O23 - Service: APC UPS Service - American Power Conversion Corporation - C:\Program Files\APC\APC PowerChute Personal Edition\mainserv.exe
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
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: Bonjour Service - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Imapi Helper - Alex Feinman - C:\Program Files\Alex Feinman\ISO Recorder\ImapiHelper.exe
O23 - Service: Iomega App Services - Iomega Corporation - C:\PROGRA~1\Iomega\System32\AppServices.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Sun Microsystems, Inc. - C:\Program Files\Java\jre6\bin\jqs.exe
O23 - Service: Lavasoft Ad-Aware Service - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware\AAWService.exe
O23 - Service: McAfee Services (mcmscsvc) - McAfee, Inc. - C:\PROGRA~1\McAfee\MSC\mcmscsvc.exe
O23 - Service: McAfee Network Agent (McNASvc) - McAfee, Inc. - c:\PROGRA~1\COMMON~1\mcafee\mna\mcnasvc.exe
O23 - Service: McAfee Scanner (McODS) - McAfee, Inc. - C:\PROGRA~1\McAfee\VIRUSS~1\mcods.exe
O23 - Service: McAfee Proxy Service (McProxy) - McAfee, Inc. - c:\PROGRA~1\COMMON~1\mcafee\mcproxy\mcproxy.exe
O23 - Service: McAfee Real-time Scanner (McShield) - McAfee, Inc. - C:\PROGRA~1\McAfee\VIRUSS~1\mcshield.exe
O23 - Service: McAfee SystemGuards (McSysmon) - McAfee, Inc. - C:\PROGRA~1\McAfee\VIRUSS~1\mcsysmon.exe
O23 - Service: McAfee Personal Firewall Service (MpfService) - McAfee, Inc. - C:\Program Files\McAfee\MPF\MPFSrv.exe
O23 - Service: PDAgent - Raxco Software, Inc. - C:\Program Files\Raxco\PerfectDisk\PDAgent.exe
O23 - Service: PDEngine - Raxco Software, Inc. - C:\Program Files\Raxco\PerfectDisk\PDEngine.exe
O23 - Service: SoundMAX Agent Service (SoundMAX Agent Service (default)) - Analog Devices, Inc. - C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe
O23 - Service: Iomega Active Disk (_IOMEGA_ACTIVE_DISK_SERVICE_) - Iomega Corporation - C:\Program Files\Iomega\AutoDisk\ADService.exe

--
End of file - 9699 bytes

Thanks so much for your willingness to see if I am infected. Below are the logs you requested:

Rooter.exe (v1.0.2) by Eric_71
.
SeDebugPrivilege granted successfully ...
.
Windows XP Home Edition (5.1.2600) Service Pack 3
[32_bits] - x86 Family 15 Model 4 Stepping 10, AuthenticAMD
.
[wscsvc] (Security Center) RUNNING (state:4)
[SharedAccess] RUNNING (state:4)
Windows Firewall -> Disabled !
.
Internet Explorer 8.0.6001.18702
.
A:\ [Removable]
C:\ [Fixed-NTFS] .. ( Total:71 Go - Free:49 Go )
D:\ [Fixed-NTFS] .. ( Total:4 Go - Free:3 Go )
E:\ [Removable]
F:\ [CD_Rom]
G:\ [CD_Rom]
.
Scan : 10:20.26
Path : C:\Documents and Settings\Warren Strickland\Desktop\Rooter.exe
User : Warren Strickland ( Administrator -> YES )
.
----------------------\\ Processes
.
Locked [System Process] (0)
______ System (4)
______ \SystemRoot\System32\smss.exe (580)
______ \??\C:\WINDOWS\system32\csrss.exe (644)
______ \??\C:\WINDOWS\system32\winlogon.exe (668)
______ C:\WINDOWS\system32\services.exe (712)
______ C:\WINDOWS\system32\lsass.exe (724)
______ C:\WINDOWS\system32\Ati2evxx.exe (896)
______ C:\WINDOWS\system32\svchost.exe (908)
______ C:\WINDOWS\system32\svchost.exe (992)
______ C:\WINDOWS\System32\svchost.exe (1084)
______ C:\WINDOWS\System32\svchost.exe (1188)
______ C:\WINDOWS\System32\svchost.exe (1396)
______ C:\WINDOWS\system32\Ati2evxx.exe (1576)
______ C:\WINDOWS\Explorer.EXE (1640)
______ C:\WINDOWS\system32\spoolsv.exe (1672)
______ C:\Program Files\Motherboard Monitor 5\MBM5.EXE (1916)
______ C:\Program Files\Logitech\MouseWare\system\em_exec.exe (196)
______ C:\Program Files\Hewlett-Packard\HP Software Update\HPWuSchd.exe (204)
______ C:\Program Files\HP\hpcoretech\hpcmpmgr.exe (208)
______ C:\Program Files\Common Files\Java\Java Update\jusched.exe (276)
______ C:\Program Files\iTunes\iTunesHelper.exe (308)
______ C:\Program Files\Windows Media Player\WMPNSCFG.exe (384)
______ C:\WINDOWS\System32\svchost.exe (1196)
______ C:\Program Files\APC\APC PowerChute Personal Edition\mainserv.exe (1260)
______ C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe (1292)
______ C:\Program Files\Bonjour\mDNSResponder.exe (1360)
______ C:\WINDOWS\System32\svchost.exe (1448)
______ C:\PROGRA~1\Iomega\System32\AppServices.exe (1460)
______ C:\Program Files\Java\jre6\bin\jqs.exe (1488)
______ C:\PROGRA~1\McAfee\MSC\mcmscsvc.exe (1556)
______ c:\PROGRA~1\COMMON~1\mcafee\mna\mcnasvc.exe (1704)
______ C:\Program Files\APC\APC PowerChute Personal Edition\apcsystray.exe (1912)
______ c:\PROGRA~1\COMMON~1\mcafee\mcproxy\mcproxy.exe (2000)
______ C:\PROGRA~1\McAfee\VIRUSS~1\mcshield.exe (2032)
______ C:\Program Files\McAfee\MPF\MPFSrv.exe (236)
______ C:\Program Files\Raxco\PerfectDisk\PDAgent.exe (360)
______ C:\Program Files\Analog Devices\SoundMAX\SMAgent.exe (1792)
______ C:\Program Files\UPHClean\uphclean.exe (2112)
______ C:\WINDOWS\System32\ups.exe (2160)
______ C:\Program Files\Iomega\AutoDisk\ADService.exe (2228)
______ C:\Program Files\Windows Media Player\WMPNetwk.exe (2452)
______ c:\PROGRA~1\mcafee.com\agent\mcagent.exe (2524)
______ C:\Program Files\iPod\bin\iPodService.exe (3328)
______ C:\WINDOWS\System32\alg.exe (3568)
______ C:\PROGRA~1\McAfee\VIRUSS~1\mcsysmon.exe (3624)
______ c:\PROGRA~1\mcafee\VIRUSS~1\mcvsshld.exe (1620)
______ C:\PROGRA~1\McAfee\VIRUSS~1\mcods.exe (1732)
______ C:\Documents and Settings\Warren Strickland\Desktop\Rooter.exe (3212)
.
----------------------\\ Device\Harddisk0\
.
\Device\Harddisk0 [Sectors : 63 x 512 Bytes]
.
\Device\Harddisk0\Partition1 --[ MBR ]-- (Start_Offset:32256 | Length:76708929024)
\Device\Harddisk0\Partition0 (Start_Offset:76708961280 | Length:5239503360)
\Device\Harddisk0\Partition2 (Start_Offset:76708993536 | Length:5239471104)
.
----------------------\\ Scheduled Tasks
.
C:\WINDOWS\Tasks\desktop.ini
C:\WINDOWS\Tasks\SA.DAT
C:\WINDOWS\Tasks\UPS System Shutdown Program.job
C:\WINDOWS\Tasks\User_Feed_Synchronization-{AF9EE615-EF9F-41DF-B07D-9F7C4ADED09B}.job
.
----------------------\\ Registry
.
.
----------------------\\ Files & Folders
.
----------------------\\ Scan completed at 10:20.45
.
C:\Rooter$\Rooter_1.txt - (20/02/2010 | 10:20.45)


LockSearch by jpshortstuff (05.11.09.1)
Log created at 10:26 on 20/02/2010 (Warren Strickland)
Scanning C:\


C:\hiberfil.sys
-------------------------


C:\pagefile.sys
-------------------------

-=E.O.F=-

CKScanner - Additional Security Risks - These are not necessarily bad
c:\documents and settings\warren strickland\favorites\shopping\blacktop crack seal # 864005 by quikrete company.url
c:\program files\jasc software inc\paint shop pro 8\bump maps\cracked desert.pspimage
c:\program files\jasc software inc\paint shop pro 8\patterns\cracked paint.pspimage
c:\program files\jasc software inc\paint shop pro 8\picture frames\black crackle.pspframe
c:\program files\jasc software inc\paint shop pro 8\presets\preset_fineleather_crackle.pspscript
c:\program files\jasc software inc\paint shop pro 8\presets\preset_fineleather_more cracks.pspscript
c:\program files\jasc software inc\paint shop pro 8\presets\preset_fineleather_small cracks.pspscript
scanner sequence 3.FA.11
----- EOF -----

Cheetah-Anti-Rogue v1.3.9
by DragonMaster Jay

Microsoft Windows XP [Version 5.1.2600]
Date: 02/20/2010 - Time: 10:41:40 - Arch.: x86


-- Malware removal tools check --
Malwarebytes' Anti-Malware
SUPERAntiSpyware


-- Known infection --



Extra message: Detection only.


EOF

Thanks for continuing to assess this on my behalf. Thusfar, there has been no reoccurrence of the browser closing unexpectedly for the past 24 hours. Nonetheless, I wish to ensure this System Security virus or whatever else may have caused this is not still on my computer.
I really appreciate the time you have taken to look into this.

Malwarebytes' Anti-Malware 1.44
Database version: 3767
Windows 5.1.2600 Service Pack 3
Internet Explorer 8.0.6001.18702

2/20/2010 12:41:50 PM
mbam-log-2010-02-20 (12-41-50).txt

Scan type: Quick Scan
Objects scanned: 129404
Time elapsed: 6 minute(s), 36 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

Below is the log from ESET Online Scanner:

# IEXPLORE.EXE=8.00.6001.18702 (longhorn_ie8_rtm(wmbla).090308-0339)
# OnlineScanner.ocx=1.0.0.6211
# api_version=3.0.2
# EOSSerial=99005f23cbb6504e80212680a1235617
# end=finished
# remove_checked=true
# archives_checked=false
# unwanted_checked=true
# unsafe_checked=false
# antistealth_checked=true
# utc_time=2010-02-20 08:16:49
# local_time=2010-02-20 03:16:49 (-0500, Eastern Standard Time)
# country="United States"
# lang=1033
# osver=5.1.2600 NT Service Pack 3
# compatibility_mode=512 16777215 100 0 21117840 21117840 0 0
# compatibility_mode=5121 16776533 100 96 167439 18702032 0 0
# compatibility_mode=8192 67108863 100 0 0 0 0 0
# scanned=72915
# found=0
# cleaned=0
# scan_time=3704

It does indeed seem to be the case. I can't quite figure out what caused the original problem or how it resolved itself. Nevertheless, I appreciate your willingness to assist. I shall certainly use this forum again when the need arrives!!