Trojan Horse/hijacked Browser

Hi, you helped me with something similar before, perhaps you could do so again. AVG clears the virus but as soon as I open the internet, not email, connection it reactivates and multiplies. Here's the Hijack This log. Thank you.

Logfile of HijackThis v1.97.7
Scan saved at 17:21:42, on 30/06/2004
Platform: Windows XP SP1 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP1 (6.00.2800.1106)

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\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\Grisoft\AVG6\avgserv.exe
C:\WINDOWS\System32\CAP3RSK.EXE
C:\WINDOWS\System32\hkcmd.exe
C:\PROGRA~1\Grisoft\AVG6\avgcc32.exe
C:\WINDOWS\SYSTEM32\SPOOL\DRIVERS\W32X86\3\CAP3SWK.EXE
C:\WINDOWS\SYSTEM32\SPOOL\DRIVERS\W32X86\3\CAP3LAK.EXE
C:\Program Files\Digital Line Detect\DLG.exe
C:\Documents and Settings\Aine O'Connor\My Documents\Hijackthis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = res://C:\WINDOWS\ixgqc.dll/sp.html#12802
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = res://ixgqc.dll/index.html#12802
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.euro.dell.com/countries/uk/enu/gen/default.htm
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = res://ixgqc.dll/index.html#12802
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = res://C:\WINDOWS\ixgqc.dll/sp.html#12802
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = res://ixgqc.dll/index.html#12802
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = res://C:\WINDOWS\ixgqc.dll/sp.html#12802
O2 - BHO: (no name) - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - c:\program files\common files\Reader\ActiveX\AcroIEHelper.ocx
O2 - BHO: (no name) - {CC5AE66A-1C52-B62A-D032-EC2DB2630092} - C:\WINDOWS\ntbf32.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: Yahoo! Companion - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\ycomp5_3_16_0.dll (file missing)
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\System32\igfxtray.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [AVG_CC] C:\PROGRA~1\Grisoft\AVG6\avgcc32.exe /STARTUP
O4 - HKLM\..\Run: [CAP3ON] C:\WINDOWS\System32\spool\drivers\w32x86\3\CAP3ONN.EXE
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - Global Startup: Canon LASER SHOT LBP-1120 Status Window.LNK = C:\WINDOWS\SYSTEM32\SPOOL\DRIVERS\W32X86\3\CAP3LAK.EXE
O4 - Global Startup: Digital Line Detect.lnk = ?
O12 - Plugin for .spop: C:\Program Files\Internet Explorer\Plugins\NPDocBox.dll
O16 - DPF: JCrypto For Applets - https://www.ros.ie/applets/jcrypto.cab
O16 - DPF: KCrypto for Applets - https://www.ros.ie:/applets/kcrypto.cab
O16 - DPF: Ulster Bank AnyTime - https://anytime2.ulsterbank.com/asp/AnyTime.cab
O16 - DPF: {19E28AFC-EAE3-4CE5-AC83-2407B42F57C9} (MSSecurityAdvisor Class) - http://download.microsoft.com/download/0/5…b?1082130464953
O16 - DPF: {30528230-99F7-4BB4-88D8-FA1D4F56A2AB} (YInstStarter Class) - http://us.dl1.yimg.com/download.yahoo.com/…s/yinst0401.cab
O16 - DPF: {90A29DA5-D020-4B18-8660-6689520C7CD7} (DmiReader Class) - http://support.euro.dell.com/global/apps/s…er/PROFILER.CAB
O16 - DPF: {A8658086-E6AC-4957-BC8E-7D54A7E8A78D} (DoomCln Object) - http://www.microsoft.com/security/controls/DoomCln.CAB
O16 - DPF: {A8658086-E6AC-4957-BC8E-7D54A7E8A78E} (SassCln Object) - http://www.microsoft.com/security/controls/SassCln.CAB