Thanx for the fast reaction.
I have much less pop-ups already, but I still have the Trojans. I show you both my log-files again.
I believe I disabled AVG, because I renamed the avgw.exe-file to avgw.e_e.

Logfile of HijackThis v1.97.7
Scan saved at 16:05:01, on 26-5-2004
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:\Program Files\AntiTrojan_AlwilSoftware\Avast4\aswUpdSv.exe
C:\Program Files\AntiTrojan_AlwilSoftware\Avast4\ashServ.exe
C:\Program Files\Common Files\EPSON\EBAPI\SAgent2.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S10IC2.EXE
C:\PROGRA~1\ANTITR~1\Avast4\ashDisp.exe
C:\VirusTools\PerfectProcessAntiSpyware\ppshield.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Messenger\MSMSGS.EXE
C:\VirusTools\HijackThis\ht04\HijackThis.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.zonnet.nl/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Fedde’s Internet Explorer
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Koppelingen
O2 - BHO: (no name) - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 6.0\Reader\ActiveX\AcroIEHelper.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM..\Run: [SiS KHooker] C:\WINDOWS\System32\khooker.exe
O4 - HKLM..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM..\Run: [NeroCheck] C:\WINDOWS\System32\NeroCheck.exe
O4 - HKLM..\Run: [EPSON Stylus C44 Series] C:\WINDOWS\System32\spool\DRIVERS\W32X86\3\E_S10IC2.EXE /P23 “EPSON Stylus C44 Series” /O6 “USB001” /M “Stylus C44”
O4 - HKLM..\Run: [AVG_CC] C:\PROGRA~1\GRISOF~1\AVG6\avgcc32.exe /STARTUP
O4 - HKLM..\Run: [avast!] C:\PROGRA~1\ANTITR~1\Avast4\ashDisp.exe
O4 - HKLM..\Run: [Perfect Process shield] C:\VirusTools\PerfectProcessAntiSpyware\ppshield.exe
O4 - HKCU..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU..\Run: [MSMSGS] “C:\Program Files\Messenger\MSMSGS.EXE” /background
O9 - Extra button: PopupPopper Configuratiescherm (HKLM)
O9 - Extra button: Messenger (HKLM)
O9 - Extra ‘Tools’ menuitem: Windows Messenger (HKLM)
O16 - DPF: {003FADA5-8FEE-11D6-AFB7-0004768F6183} (CryptoRSA Control) - https://www.p3.postbank.nl/sesam/CAX.cab
O16 - DPF: {02BF25D5-8C17-4B23-BC80-D3488ABDDC6B} (QuickTime Object) - http://www.apple.com/qtactivex/qtplugin.cab
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Besturing) - http://a840.g.akamai.net/7/840/537/7d90ae05585062/housecall.antivirus.com/housecall/xscan53.cab
O16 - DPF: {7B297BFD-85E4-4092-B2AF-16A91B2EA103} (WScanCtl Class) - http://www3.ca.com/securityadvisor/virusinfo/webscan.cab
O16 - DPF: {9F1C11AA-197B-4942-BA54-47A8489BB47F} (Update Class) - http://v4.windowsupdate.microsoft.com/CAB/x86/unicode/iuctl.CAB?37949.0066550926
O16 - DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} (Shockwave Flash Object) - http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab

26-5-2004 15:44:12 1085579052 FEDDISK2004\Fedde 1180 Sign of “Win32:DyfucDldr-E [Trj]” has been found in “C:\Documents and Settings\Fedde\Local Settings\Temporary Internet Files\Content.IE5\QVE3MLE3\install[1][UPX]” file.
26-5-2004 15:45:45 1085579145 FEDDISK2004\Fedde 1180 Sign of “Win32:DyfucDldr-G [Trj]” has been found in “C:\Documents and Settings\Fedde\Local Settings\Temporary Internet Files\Content.IE5\TMFHHAOU\vviewer[1].cab\vviewer.ocx” file.
26-5-2004 15:48:49 1085579329 FEDDISK2004\Fedde 1180 Sign of “Win32:DyfucDldr-G [Trj]” has been found in “C:\Program Files\AntiTrojan_AlwilSoftware\Avast4\DATA\moved\vviewer.ocx.vir” file.
26-5-2004 15:48:49 1085579329 FEDDISK2004\Fedde 1180 Sign of “Win32:DyfucDldr-E [Trj]” has been found in “C:\Program Files\AntiTrojan_AlwilSoftware\Avast4\DATA\moved[UPX].vir” file.
26-5-2004 16:00:24 1085580024 NT AUTHORITY\SYSTEM 1600 Sign of “Win32:DyfucDldr-E [Trj]” has been found in “C:\Program Files\AntiTrojan_AlwilSoftware\Avast4\DATA\moved[UPX].vir.vir” file.
26-5-2004 16:00:34 1085580034 NT AUTHORITY\SYSTEM 1600 Sign of “Win32:DyfucDldr-G [Trj]” has been found in “C:\Program Files\AntiTrojan_AlwilSoftware\Avast4\DATA\moved\vviewer.ocx.vir.vir” file.