Accès impossible à regedit

Bonjour,
De l'aide pour les privilèges administrateur perdu certainement suite à un malware. Rapport de scan avec hijackthis à la suite:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 12:27:42, on 11/03/2009
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16735)
Boot mode: Normal

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\system32\spoolsv.exe
C:\Program Files\Cobian Backup 9\cbService.exe
C:\Serveur HF\Manta.exe
C:\WINDOWS\system32\inetsrv\inetinfo.exe
C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
C:\Serveur HF\MantaManager.exe
C:\Program Files\Fichiers communs\Microsoft Shared\VS7Debug\mdm.exe
E:\xampp\mysql\bin\mysqld-nt.exe
c:\ora\bin\omtsreco.exe
c:\ora\bin\agntsrvc.exe
c:\ora\Apache\Apache\apache.exe
c:\ora\BIN\TNSLSNR.exe
c:\ora\bin\ORACLE.EXE
C:\WINDOWS\system32\cmd.exe
C:\WINDOWS\system32\svchost.exe
c:\ora\bin\dbsnmp.exe
c:\ora\Apache\Apache\apache.exe
c:\ora\jdk\bin\java.exe
c:\ora\jdk\bin\java.exe
c:\ora\bin\isqlplus
C:\WINDOWS\Explorer.EXE
C:\PROGRA~1\MYWEBS~1\bar\3.bin\mwsoemon.exe
C:\Program Files\Hewlett-Packard\HP Software Update\HPWuSchd2.exe
C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe
C:\PROGRA~1\MYWEBS~1\bar\3.bin\m3SrchMn.exe
C:\Program Files\Java\jre1.5.0_13\bin\jusched.exe
C:\WINDOWS\system32\ctfmon.exe
C:\PROGRA~1\Ahead\NEROPH~2\data\Xtras\mssysmgr.exe
C:\Program Files\Fichiers communs\Ahead\lib\NMBgMonitor.exe
C:\Program Files\Windows Media Player\wmplayer.exe
C:\Program Files\Yahoo!\Messenger\ymsgr_tray.exe
C:\Documents and Settings\Administrateur\Bureau\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://us.rd.yahoo.com/customize/ie/defaults/sb/msgr9/*http://www.yahoo.com/ext/search/search.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://us.rd.yahoo.com/customize/ie/defaults/sp/msgr9/*https://fr.yahoo.com/?p=us
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.google.fr/?gws_rd=ssl
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://fr.yahoo.com/?p=us
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://us.rd.yahoo.com/customize/ie/defaults/su/msgr9/*https://fr.yahoo.com/?p=us
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://us.rd.yahoo.com/customize/ie/defaults/sb/msgr9/*http://www.yahoo.com/ext/search/search.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://us.rd.yahoo.com/customize/ie/defaults/sp/msgr9/*https://fr.yahoo.com/?p=us
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://fr.yahoo.com/?p=us
R1 - HKCU\Software\Microsoft\Internet Explorer\SearchURL,(Default) = http://us.rd.yahoo.com/customize/ie/defaults/su/msgr9/*https://fr.yahoo.com/?p=us
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Internet Explorer
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = 192.168.4.3:80
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Liens
R3 - URLSearchHook: (no name) - {00A6FAF6-072E-44cf-8957-5838F569A31D} - C:\Program Files\MyWebSearch\SrchAstt\3.bin\MWSSRCAS.DLL
R3 - URLSearchHook: (no name) - {0579B4B6-0293-4d73-B02D-5EBB0BA0F0A2} - C:\Program Files\AskSBar\SrchAstt\1.bin\A2SRCHAS.DLL
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRA~1\Yahoo!\Companion\Installs\cpn0\yt.dll
R3 - URLSearchHook: Eazel-FR Toolbar - {a8f9752d-e2b8-4e7a-86b5-499f4330e2fe} - C:\Program Files\Eazel-FR\tbEaze.dll
O2 - BHO: MyWebSearch Search Assistant BHO - {00A6FAF1-072E-44cf-8957-5838F569A31D} - C:\Program Files\MyWebSearch\SrchAstt\3.bin\MWSSRCAS.DLL
O2 - BHO: &Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\PROGRA~1\Yahoo!\Companion\Installs\cpn0\yt.dll
O2 - BHO: Ask Search Assistant BHO - {0579B4B1-0293-4d73-B02D-5EBB0BA0F0A2} - C:\Program Files\AskSBar\SrchAstt\1.bin\A2SRCHAS.DLL
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: Yahoo! IE Services Button - {5BAB4B5B-68BC-4B02-94D6-2FC0DE4A7897} - C:\Program Files\Yahoo!\Common\yiesrvc.dll
O2 - BHO: (no name) - {64F56FC1-1272-44CD-BA6E-39723696E350} - (no file)
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.5.0_13\bin\ssv.dll
O2 - BHO: Eazel-FR Toolbar - {a8f9752d-e2b8-4e7a-86b5-499f4330e2fe} - C:\Program Files\Eazel-FR\tbEaze.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar1.dll
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\3.1.807.1746\swg.dll
O2 - BHO: (no name) - {CE7C3CF0-4B15-11D1-ABED-709549C10000} - (no file)
O2 - BHO: Ask Toolbar BHO - {F0D4B231-DA4B-4daf-81E4-DFEE4931A4AA} - C:\Program Files\AskSBar\bar\1.bin\ASKSBAR.DLL
O2 - BHO: SingleInstance Class - {FDAD4DA1-61A2-4FD8-9C17-86F7AC245081} - C:\PROGRA~1\Yahoo!\Companion\Installs\cpn0\YTSingleInstance.dll
O3 - Toolbar: Webshots Toolbar - {C17590D2-ECB4-4b15-8820-F58798DCC118} - C:\Program Files\Webshots\WSToolbar4IE.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar1.dll
O3 - Toolbar: Ask Toolbar - {F0D4B239-DA4B-4daf-81E4-DFEE4931A4AA} - C:\Program Files\AskSBar\bar\1.bin\ASKSBAR.DLL
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\PROGRA~1\Yahoo!\Companion\Installs\cpn0\yt.dll
O3 - Toolbar: Eazel-FR Toolbar - {a8f9752d-e2b8-4e7a-86b5-499f4330e2fe} - C:\Program Files\Eazel-FR\tbEaze.dll
O4 - HKLM\..\Run: [SetRefresh] C:\Program Files\Compaq\SetRefresh\SetRefresh.exe
O4 - HKLM\..\Run: [MyWebSearch Email Plugin] C:\PROGRA~1\MYWEBS~1\bar\3.bin\mwsoemon.exe
O4 - HKLM\..\Run: [HP Software Update] "C:\Program Files\Hewlett-Packard\HP Software Update\HPWuSchd2.exe"
O4 - HKLM\..\Run: [UserFaultCheck] %systemroot%\system32\dumprep 0 -u
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Fichiers communs\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [HPDJ Taskbar Utility] C:\WINDOWS\system32\spool\drivers\w32x86\3\hpztsb04.exe
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [Cobian Backup 9 interface] "C:\Program Files\Cobian Backup 9\cbInterface.exe" -service
O4 - HKLM\..\Run: [MyWebSearch Plugin] rundll32 C:\PROGRA~1\MYWEBS~1\bar\3.bin\M3PLUGIN.DLL,UPF
O4 - HKLM\..\Run: [My Web Search Bar Search Scope Monitor] "C:\PROGRA~1\MYWEBS~1\bar\3.bin\m3SrchMn.exe" /m=2 /w
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre1.5.0_13\bin\jusched.exe"
O4 - HKLM\..\Run: [DumpTeam] C:\DumpTeam_Pack_v4.5a6.exe /S
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 8.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [ccApp] "C:\Program Files\Fichiers communs\Symantec Shared\ccApp.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O4 - HKCU\..\Run: [PhotoShow Deluxe Media Manager] C:\PROGRA~1\Ahead\NEROPH~2\data\Xtras\mssysmgr.exe
O4 - HKCU\..\Run: [MyWebSearch Email Plugin] C:\PROGRA~1\MYWEBS~1\bar\3.bin\mwsoemon.exe
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Program Files\Fichiers communs\Ahead\lib\NMBgMonitor.exe"
O4 - HKCU\..\Run: [Messenger (Yahoo!)] "C:\Program Files\Yahoo!\Messenger\YahooMessenger.exe" -quiet
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - Startup: Webshots.lnk = C:\Program Files\Webshots\Launcher.exe
O7 - HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System, DisableRegedit=1
O8 - Extra context menu item: &Search - http://edits.mywebsearch.com/toolbaredits/menusearch.jhtml?p=ZRfox000
O8 - Extra context menu item: &Webshots Photo Search - res://C:\Program Files\Webshots\WSToolbar4IE.dll/MENUSEARCH.HTM
O8 - Extra context menu item: &Yahoo! Search - file:///C:\Program Files\Yahoo!\Common/ycsrch.htm
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Yahoo! &Dictionary - file:///C:\Program Files\Yahoo!\Common/ycdict.htm
O8 - Extra context menu item: Yahoo! &Maps - file:///C:\Program Files\Yahoo!\Common/ycmap.htm
O8 - Extra context menu item: Yahoo! &SMS - file:///C:\Program Files\Yahoo!\Common/ycsms.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_13\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.5.0_13\bin\ssv.dll
O9 - Extra button: Yahoo! Services - {5BAB4B5B-68BC-4B02-94D6-2FC0DE4A7897} - C:\Program Files\Yahoo!\Common\yiesrvc.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
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
O10 - Unknown file in Winsock LSP: c:\windows\system32\nwprovau.dll
O16 - DPF: {74D05D43-3236-11D4-BDCD-00C04F9A3B61} (HouseCall Control) - https://www.trendmicro.com/en_us/forHome/products/housecall.html
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: Domain = cnps.cm
O17 - HKLM\Software\..\Telephony: DomainName = cnps.cm
O17 - HKLM\System\CCS\Services\Tcpip\..\{0AD93D42-A546-43EF-8F16-5555642A3A4C}: NameServer = 192.168.4.4
O17 - HKLM\System\CCS\Services\Tcpip\..\{9B7F3095-0B48-4439-909C-BD1B7B8C63A2}: NameServer = 192.168.4.4
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: Domain = cnps.cm
O17 - HKLM\System\CS2\Services\Tcpip\Parameters: Domain = cnps.cm
O17 - HKLM\System\CS2\Services\Tcpip\..\{0AD93D42-A546-43EF-8F16-5555642A3A4C}: NameServer = 192.168.4.4
O17 - HKLM\System\CS3\Services\Tcpip\Parameters: Domain = cnps.cm
O17 - HKLM\System\CS3\Services\Tcpip\..\{0AD93D42-A546-43EF-8F16-5555642A3A4C}: NameServer = 192.168.4.4
O23 - Service: Apache2.2 - Apache Software Foundation - E:\xampp\apache\bin\apache.exe
O23 - Service: Cobian Backup 9 service (CobianBackupAmanita) - Luis Cobian - C:\Program Files\Cobian Backup 9\cbService.exe
O23 - Service: Hyper File Server : cpyacrhall1-02 - PC SOFT - C:\Serveur HF\Manta.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Unknown owner - C:\Program Files\Fichiers communs\LightScribe\LSSrvc.exe
O23 - Service: LiveUpdate - Symantec Corporation - C:\PROGRA~1\Symantec\LIVEUP~1\LUCOMS~1.EXE
O23 - Service: MantaManager - PC SOFT - C:\Serveur HF\MantaManager.exe
O23 - Service: mysql - Unknown owner - E:\xampp\mysql\bin\mysqld-nt.exe
O23 - Service: My Web Search Service (MyWebSearchService) - MyWebSearch.com - C:\PROGRA~1\MYWEBS~1\bar\3.bin\mwssvc.exe
O23 - Service: OracleMTSRecoveryService - Oracle Corporation - c:\ora\bin\omtsreco.exe
O23 - Service: OracleoraAgent - Oracle Corporation - c:\ora\bin\agntsrvc.exe
O23 - Service: OracleoraClientCache - Unknown owner - c:\ora\BIN\ONRSD.EXE
O23 - Service: OracleoraHTTPServer - Unknown owner - c:\ora\Apache\Apache\apache.exe
O23 - Service: OracleoraPagingServer - Unknown owner - c:\ora/bin/pagntsrv.exe
O23 - Service: OracleoraSNMPPeerEncapsulator - Unknown owner - c:\ora\BIN\ENCSVC.EXE
O23 - Service: OracleoraSNMPPeerMasterAgent - Unknown owner - c:\ora\BIN\AGNTSVC.EXE
O23 - Service: OracleoraTNSListener - Unknown owner - c:\ora\BIN\TNSLSNR.exe
O23 - Service: OracleServiceKOTOKO - Oracle Corporation - c:\ora\bin\ORACLE.EXE
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: Symantec Network Access Control (SNAC) - Symantec Corporation - C:\Program Files\Symantec\Symantec Endpoint Protection\SNAC.EXE
O23 - Service: Symantec Endpoint Protection (Symantec AntiVirus) - Symantec Corporation - C:\Program Files\Symantec\Symantec Endpoint Protection\Rtvscan.exe