Impossible de supprimer un logiciel

Bonjour, impossible de supprimer scansoft pdf professionnel 4 ni dans le panneau de configuration ni manuellement. le problème c'est que dès que je veux imprimer ou que je fais un clic droit sur un fichier (pour le copier par ex), il veut s'installer.

Merci de m'aider à m'en débarrasser, je pose mon rapport hijackthis, je ne sais pas ce qu'il faut supprimer.
J'ai aussi un outil pc soft qui sort de je ne sais où et que je n'arrive pas à supprimer non plus: WDSvgApp.

Si qqn peut m'aiguiller, ce serait sympa.

Logfile of HijackThis v1.99.1
Scan saved at 11:07:45, on 23.07.2007
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\csrss.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\System32\Serv_SpUsb.exe
C:\WINDOWS\System32\XELIOS\xplpclt.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\System32\alg.exe
C:\Program Files\Sunbelt Software\Personal Firewall\kpf4ss.exe
C:\Program Files\SolidDocuments\SolidConverterPDF\SCPDF\SolidPdfService.exe
C:\Program Files\Spyware Doctor\sdhelp.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\WINDOWS\SOUNDMAN.EXE
C:\Program Files\XELIOS\PC Login Pro Client\xcrtprt.exe
C:\Program Files\XELIOS\PC Login Pro Client\xlnchr.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\Program Files\Java\jre1.6.0_01\bin\jusched.exe
C:\WINDOWS\System32\dslagent.exe
C:\Program Files\Messenger\MSMSGS.EXE
C:\Program Files\Hewlett-Packard\Digital Imaging\bin\hpotdd01.exe
C:\MSSQL7\Binn\sqlmangr.exe
C:\Program Files\Sunbelt Software\Personal Firewall\kpf4gui.exe
C:\Program Files\XELIOS\PC Login Pro Client\X-SSO\ssoengine.exe
C:\Program Files\Sunbelt Software\Personal Firewall\kpf4gui.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Microsoft Office\OFFICE11\EXCEL.EXE
C:\WINDOWS\System32\msiexec.exe
C:\PROGRA~1\IZArc\IZArc.exe
C:\DOCUME~1\VAL~1.VAL\LOCALS~1\Temp\ARC76\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.alicestare.com/
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
O2 - BHO: HelperObject Class - {00C6482D-C502-44C8-8409-FCE54AD9C208} - C:\Program Files\TechSmith\SnagIt 7\SnagItBHO.dll
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Solid Converter PDF - {259F616C-A300-44F5-B04A-ED001A26C85C} - C:\Program Files\SolidDocuments\SolidConverterPDF\SCPDF\ExploreExtPDF.dll
O2 - BHO: PCTools Site Guard - {5C8B2A36-3DB1-42A4-A3CB-D426709BBFEB} - C:\PROGRA~1\SPYWAR~1\tools\iesdsg.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O2 - BHO: PCTools Browser Monitor - {B56A7D7D-6927-48C8-A975-17DF180C71AC} - C:\PROGRA~1\SPYWAR~1\tools\iesdpb.dll
O2 - BHO: SSOWatch Notification Class - {F3DCA10E-35FF-11D4-8744-00105A658389} - C:\Program Files\XELIOS\PC Login Pro Client\X-SSO\ie_notifier.dll
O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O3 - Toolbar: SnagIt - {8FF5E183-ABDE-46EB-B09E-D2AAB95CABE3} - C:\Program Files\TechSmith\SnagIt 7\SnagItIEAddin.dll
O3 - Toolbar: Solid Converter PDF - {259F616C-A300-44F5-B04A-ED001A26C85C} - C:\Program Files\SolidDocuments\SolidConverterPDF\SCPDF\ExploreExtPDF.dll
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [SoundMan] SOUNDMAN.EXE
O4 - HKLM\..\Run: [SSOHTTP] C:\Program Files\XELIOS\PC Login Pro Client\X-SSO\SSOHTTP.exe
O4 - HKLM\..\Run: [xCertProt] C:\Program Files\XELIOS\PC Login Pro Client\xcrtprt.exe
O4 - HKLM\..\Run: [xLauncher] C:\Program Files\XELIOS\PC Login Pro Client\xlnchr.exe
O4 - HKLM\..\Run: [SSBkgdUpdate] "C:\Program Files\Fichiers communs\Scansoft Shared\SSBkgdUpdate\SSBkgdupdate.exe" -Embedding -boot
O4 - HKLM\..\Run: [PDF4 Registry Controller] "C:\Program Files\ScanSoft\PDF Professional 4.0\\RegistryController.exe"
O4 - HKLM\..\Run: [ISUSPM Startup] "C:\Program Files\Fichiers communs\InstallShield\UpdateService\ISUSPM.exe" -startup
O4 - HKLM\..\Run: [ISUSScheduler] "C:\Program Files\Fichiers communs\InstallShield\UpdateService\issch.exe" -start
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.6.0_01\bin\jusched.exe"
O4 - HKLM\..\Run: [DSLAGENTEXE] dslagent.exe USB
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\MSMSGS.EXE" /background
O4 - Global Startup: hpoddt01.exe.lnk = ?
O4 - Global Startup: Lancement rapide d'Adobe Reader.lnk = C:\Program Files\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: Service Manager.lnk = C:\MSSQL7\Binn\sqlmangr.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Control Panel present
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_01\bin\npjpi160_01.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_01\bin\npjpi160_01.dll
O9 - Extra button: Spyware Doctor - {2D663D1A-8670-49D9-A1A5-4C56B4E14E84} - C:\PROGRA~1\SPYWAR~1\tools\iesdpb.dll
O9 - Extra button: Recherche - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
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
O16 - DPF: {7584C670-2274-4EFB-B00B-D6AABA6D3850} (Microsoft RDP Client Control (redist)) - https://212.147.94.11/Remote/msrdp.cab
O20 - Winlogon Notify: Xelios - C:\WINDOWS\SYSTEM32\xlne.dll
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - 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: Sunbelt Kerio Personal Firewall 4 (KPF4) - Sunbelt Software - C:\Program Files\Sunbelt Software\Personal Firewall\kpf4ss.exe
O23 - Service: SAGEM MorphoSmart Service Provider Usb Server (MSO_SpUsb_Service) - Sagem SA - C:\WINDOWS\System32\Serv_SpUsb.exe
O23 - Service: SolidPDFConverterReadSpool (ScReadSpool) - VoyagerSoft, LLC - C:\Program Files\SolidDocuments\SolidConverterPDF\SCPDF\SolidPdfService.exe
O23 - Service: PC Tools Spyware Doctor (SDhelper) - PC Tools Research Pty Ltd - C:\Program Files\Spyware Doctor\sdhelp.exe
O23 - Service: FW Live Update (UmxLU) - Tiny Software, Inc. - C:\Program Files\Fichiers communs\PFShared\umxlu.exe
O23 - Service: Xelios PC Login Pro Client - E-SOFTWARE S.A.S - C:\WINDOWS\System32\XELIOS\xplpclt.exe