Hi guys, I humbly put my log file in your hands, its been months now I receive this message each time I startup (Windows XP SP2) : RUN DLL Error loading usb496.dat The specified module could not be found.
I found this file a few month ago and deleted it as it was a trojan, but the beast must still be there…
Don't know what to do… thanks for helping me, I have a few musical software and drivers, and just cleaned with avast. Spybot has cleaned aswell…
Good luck

Here it is :
Logfile of HijackThis v1.99.1
Scan saved at 20:57:11, on 01/03/2007
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16414)

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:\Program Files\ntl\ntl Netguard\fws.exe
C:\WINDOWS\system32\LEXBCES.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\LEXPPS.EXE
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\system32\cisvc.exe
C:\WINDOWS\System32\CTsvcCDA.EXE
C:\Program Files\Common Files\Command Software\dvpapi.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\tcpsvcs.exe
C:\WINDOWS\System32\snmp.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\cidaemon.exe
C:\WINDOWS\Explorer.EXE
C:\windows\system\hpsysdrv.exe
C:\HP\KBD\KBD.EXE
C:\WINDOWS\system32\dla\tfswctrl.exe
C:\Program Files\Lexmark X1100 Series\lxbkbmgr.exe
C:\Program Files\Creative\SBAudigy4\DVDAudio\CTDVDDET.EXE
C:\Program Files\Creative\SBAudigy4\Surround Mixer\CTSysVol.exe
C:\Program Files\Lexmark X1100 Series\lxbkbmon.exe
C:\PROGRA~1\ntl\BROADB~1\SMARTB~1\MotiveSB.exe
C:\Program Files\Java\jre1.5.0_11\bin\jusched.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\WINDOWS\system32\rundll32.exe
C:\WINDOWS\CTHELPER.EXE
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\SyncroSoft\Pos\H2O\cledx.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Common Files\Ahead\lib\NMBgMonitor.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\STK014\STK014M.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\Program Files\Alwil Software\Avast4\ashSimpl.exe
C:\Program Files\Hijackthis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.co.uk/
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\Windows\CurrentVersion\Internet Settings,ProxyServer = chatrosafe.chatropolis.com:3128
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = 127.0.0.1;local.,;localhost
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Adobe Acrobat 6.0\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: Pop-Up Blocker BHO - {3C060EA2-E6A9-4E49-A530-D4657B8C449A} - C:\Program Files\ntl\ntl Netguard\pkR.dll
O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Form Filler BHO - {56071E0D-C61B-11D3-B41C-00E02927A304} - C:\Program Files\ntl\ntl Netguard\FBHR.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: AcroIEToolbarHelper Class - {AE7CD045-E861-484f-8273-0445EE161910} - C:\Program Files\Adobe\Adobe Acrobat 6.0\Acrobat\AcroIEFavClient.dll
O3 - Toolbar: Adobe PDF - {47833539-D0C5-4125-9FA8-0819E2EAAC93} - C:\Program Files\Adobe\Adobe Acrobat 6.0\Acrobat\AcroIEFavClient.dll
O4 - HKLM\..\Run: [hpsysdrv] c:\windows\system\hpsysdrv.exe
O4 - HKLM\..\Run: [KBD] C:\HP\KBD\KBD.EXE
O4 - HKLM\..\Run: [Recguard] C:\WINDOWS\SMINST\RECGUARD.EXE
O4 - HKLM\..\Run: [dla] C:\WINDOWS\system32\dla\tfswctrl.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\System32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [PS2] C:\WINDOWS\system32\ps2.exe
O4 - HKLM\..\Run: [Share-to-Web Namespace Daemon] C:\Program Files\Hewlett-Packard\HP Share-to-Web\hpgs2wnd.exe
O4 - HKLM\..\Run: [Lexmark X1100 Series] "C:\Program Files\Lexmark X1100 Series\lxbkbmgr.exe"
O4 - HKLM\..\Run: [Realtime Audio Engine] mmrtkrnl.exe
O4 - HKLM\..\Run: [CTDVDDET] "C:\Program Files\Creative\SBAudigy4\DVDAudio\CTDVDDET.EXE"
O4 - HKLM\..\Run: [CTSysVol] C:\Program Files\Creative\SBAudigy4\Surround Mixer\CTSysVol.exe /r
O4 - HKLM\..\Run: [RCSystem] "C:\Program Files\Creative\Shared Files\Module Loader\DLLML.exe" RCSystem * -Startup
O4 - HKLM\..\Run: [AudioDrvEmulator] "C:\Program Files\Creative\Shared Files\Module Loader\DLLML.exe" -1 AudioDrvEmulator "C:\Program Files\Creative\Shared Files\Module Loader\Audio Emulator\AudDrvEm.dll"
O4 - HKLM\..\Run: [UpdReg] C:\WINDOWS\UpdReg.EXE
O4 - HKLM\..\Run: [Motive SmartBridge] C:\PROGRA~1\ntl\BROADB~1\SMARTB~1\MotiveSB.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.5.0_11\bin\jusched.exe"
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [Advanced Message Server] rundll32.exe usb496.dat,Execute
O4 - HKLM\..\Run: [CTHelper] CTHELPER.EXE
O4 - HKLM\..\Run: [CTXFIREG] CTxfiReg.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: [P2P Networking] C:\WINDOWS\system32\P2P Networking\P2P Networking.exe /AUTOSTART
O4 - HKLM\..\Run: [NeroFilterCheck] C:\Program Files\Common Files\Ahead\Lib\NeroCheck.exe
O4 - HKLM\..\Run: [H2O] C:\Program Files\SyncroSoft\Pos\H2O\cledx.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Program Files\Common Files\Ahead\lib\NMBgMonitor.exe"
O4 - HKCU\..\Run: [Microsoft Works Update Detection] C:\Program Files\Microsoft Works\WkDetect.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - Global Startup: Adobe Gamma Loader.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O4 - Global Startup: STK014 PNP Monitor.lnk = ?
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_11\bin\ssv.dll
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\System32\Shdocvw.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe (file missing)
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\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
O11 - Options group: [INTERNATIONAL] International*
O16 - DPF: {00B71CFB-6864-4346-A978-C0A14556272C} (Checkers Class) - http://messenger.zone.msn.com/binary/msgrchkr.cab31267.cab
O16 - DPF: {0A5FD7C5-A45C-49FC-ADB5-9952547D5715} (Creative Software AutoUpdate) - http://www.creative.com/su/ocx/15026/CTSUEng.cab
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {1754A1BA-A1DF-4F10-B199-AA55AA1A120F} (InstallerBehaviorFactory Class) - https://signup.msn.com/pages/MsnInstC.cab
O16 - DPF: {1D6711C8-7154-40BB-8380-3DEA45B69CBF} -
O16 - DPF: {200B3EE9-7242-4EFD-B1E4-D97EE825BA53} (VerifyGMN Class) - http://h20270.www2.hp.com/ediags/gmn/insta…staller_gmn.cab
O16 - DPF: {266B9238-31A5-4B53-9039-272FE846DF9D} (DiameterTransfer Control) - http://www.sis.com/download/SISTransfer.cab
O16 - DPF: {2B323CD9-50E3-11D3-9466-00A0C9700498} (Yahoo! Audio Conferencing) - http://us.chat1.yimg.com/us.yimg.com/i/cha…v45/yacscom.cab
O16 - DPF: {3DC2E31C-371A-4BD3-9A27-CDF57CE604CF} (MSN Money Charting) - http://uk.moneycentral.msn.com/cabs/pmupd806.exe
O16 - DPF: {430DDE24-C051-11CF-95BE-0020AFF75E4F} (ichat xchat Control) - http://chat2.playboy.com:4080/chat/data/ht…sie/msichat.ocx
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://spaces.msn.com//PhotoUpload/MsnPUpld.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/…b?1142688208920
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdat…b?1145397806484
O16 - DPF: {7D1E9C49-BD6A-11D3-87A8-009027A35D73} (Yahoo! Audio UI1) - http://chat.yahoo.com/cab/yacsui.cab
O16 - DPF: {8E0D4DE5-3180-4024-A327-4DFAD1796A8D} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/Messe…nt.cab31267.cab
O16 - DPF: {AB86CE53-AC9F-449F-9399-D8ABCA09EC09} (Get_ActiveX Control) - https://h17000.www1.hp.com/ewfrf-JAVA/Secur…loadManager.ocx
O16 - DPF: {B9A296D4-38AC-4566-8168-F7ACAF7D35E6} (Eyeball Video Session Control) - http://imlive.com/ChatSource/gVideoContol.cab
O16 - DPF: {E8F628B5-259A-4734-97EE-BA914D7BE941} (Driver Agent ActiveX Control) - http://driveragent.com/files/driveragent.cab
O16 - DPF: {F6ACF75C-C32C-447B-9BEF-46B766368D29} (Creative Software AutoUpdate Support Package) - http://www.creative.com/su/ocx/15026/CTPID.cab
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O20 - Winlogon Notify: igfxcui - C:\WINDOWS\SYSTEM32\igfxsrvc.dll
O20 - Winlogon Notify: WgaLogon - C:\WINDOWS\SYSTEM32\WgaLogon.dll
O21 - SSODL: WPDShServiceObj - {AAA288BA-9A4C-45B0-95D7-94D524869DB5} - C:\WINDOWS\system32\WPDShServiceObj.dll
O23 - Service: Adobe LM Service - Unknown owner - C:\Program Files\Common Files\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - Unknown owner - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe" /service (file missing)
O23 - Service: avast! Web Scanner - Unknown owner - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe" /service (file missing)
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS\System32\CTsvcCDA.EXE
O23 - Service: DvpApi (dvpapi) - Command Software Systems, Inc. - C:\Program Files\Common Files\Command Software\dvpapi.exe
O23 - Service: Radialpoint Service (FWS) - Radialpoint Inc. - C:\Program Files\ntl\ntl Netguard\fws.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: InstallShield Licensing Service - Macrovision - C:\Program Files\Common Files\InstallShield Shared\Service\InstallShield Licensing Service.exe
O23 - Service: iPod Service - Apple Computer, Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: NBService - Nero AG - C:\Program Files\Nero\Nero 7\Nero BackItUp\NBService.exe
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe