This is my new HJT log:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 2:52:57 PM, on 5/4/2008
Platform: Windows 2000 SP4 (WinNT 5.00.2195)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)
Boot mode: Normal

Running processes:
C:\WINNT\System32\smss.exe
C:\WINNT\system32\winlogon.exe
C:\WINNT\system32\services.exe
C:\WINNT\system32\lsass.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\system32\spoolsv.exe
C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\system32\regsvc.exe
C:\WINNT\system32\MSTask.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\Explorer.EXE
C:\Program Files\QuickTime\qttask.exe
C:\Program Files\Free Download Manager\fdm.exe
C:\PROGRA~1\PANICW~1\POP-UP~1\PSFREE.EXE
C:\Program Files\NetZero\exec.exe
C:\Program Files\InternetVelocity\InternetVelocity.exe
C:\Program Files\CallWave\IAM.exe
C:\Program Files\NetZero\exec.exe
C:\Program Files\NetZero\qsacc\x1exec.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = 127.0.0.1:7900
R3 - URLSearchHook: URLSearchHook Class - {37D2CDBF-2AF4-44AA-8113-BD0D2DA3C2B8} - C:\Program Files\NetZero\SearchEnh1.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O2 - BHO: Pop-up Blocker - {52706EF7-D7A2-49AD-A615-E903858CF284} - C:\Program Files\NetZero\qsacc\X1IEBHO.dll
O2 - BHO: FDMIECookiesBHO Class - {CC59E0F9-7E43-44FA-9FAA-8377850BF205} - C:\Program Files\Free Download Manager\iefdm2.dll
O3 - Toolbar: @msdxmLC.dll,-1@1033,&Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINNT\system32\msdxm.ocx
O3 - Toolbar: ZeroBar - {F0F8ECBE-D460-4B34-B007-56A92E8F84A7} - C:\Program Files\NetZero\Toolbar.dll
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKCU\..\Run: [Free Download Manager] "C:\Program Files\Free Download Manager\fdm.exe" -autorun
O4 - HKCU\..\Run: [PopUpStopperFreeEdition] "C:\PROGRA~1\PANICW~1\POP-UP~1\PSFREE.EXE"
O4 - HKCU\..\Run: [NetZero_uoltray] C:\Program Files\NetZero\exec.exe regrun
O4 - HKCU\..\Run: [InternetVelocity] C:\Program Files\InternetVelocity\InternetVelocity.exe
O4 - HKUS\.DEFAULT\..\RunOnce: [^SetupICWDesktop] C:\Program Files\Internet Explorer\Connection Wizard\icwconn1.exe /desktop (User 'Default user')
O4 - Startup: NetZero Internet.lnk = C:\Program Files\NetZero\exec.exe
O4 - Global Startup: CallWave.lnk = C:\Program Files\CallWave\IAM.exe
O8 - Extra context menu item: Add to AMV Convert Tool... - C:\Program Files\MP3 Player Utilities 4.00\AMVConverter\grab.html
O8 - Extra context menu item: Add to Media Manager... - C:\Program Files\MP3 Player Utilities 4.00\MediaManager\grab.html
O8 - Extra context menu item: Display All Images with Full Quality - res://C:\Program Files\NetZero\qsacc\appres.dll/228
O8 - Extra context menu item: Display Image with Full Quality - res://C:\Program Files\NetZero\qsacc\appres.dll/227
O8 - Extra context menu item: Download all with Free Download Manager - file://C:\Program Files\Free Download Manager\dlall.htm
O8 - Extra context menu item: Download selected with Free Download Manager - file://C:\Program Files\Free Download Manager\dlselected.htm
O8 - Extra context menu item: Download video with Free Download Manager - file://C:\Program Files\Free Download Manager\dlfvideo.htm
O8 - Extra context menu item: Download with Free Download Manager - file://C:\Program Files\Free Download Manager\dllink.htm
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINNT\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINNT\web\related.htm
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O10 - Unknown file in Winsock LSP: ivlsp.dll
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) - http://gfx1.hotmail.com/mail/w2/resources/MSNPUpld.cab
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://www.update.microsoft.com/wind...?1206449544633
O16 - DPF: {89D75D39-5531-47BA-9E4F-B346BA9C362C} (CWDL_DownLoadControl Class) - http://www.callwave.com/include/cab/...L_DownLoad.CAB
O23 - Service: Ad-Aware 2007 Service (aawservice) - Lavasoft - C:\Program Files\Lavasoft\Ad-Aware 2007\aawservice.exe
O23 - Service: Logical Disk Manager Administrative Service (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe

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End of file - 5253 bytes

It seems to be working now.

Thanks
Mike