Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 17.39.49, on 19/08/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16705)
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\ZoneLabs\vsmon.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\AVG\AVG8\avgwdsvc.exe
c:\APPS\Powercinema\Kernel\TV\CLCapSvc.exe
c:\APPS\Powercinema\Kernel\CLML_NTService\CLMLServer.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\Apps\Softex\OmniPass\Omniserv.exe
C:\Programmi\File comuni\Ulead Systems\DVD\ULCDRSvr.exe
C:\Programmi\Sonic\DigitalMedia LE v7\MyDVD LE\USBDeviceService.exe
C:\PROGRA~1\AVG\AVG8\avgrsx.exe
c:\APPS\Powercinema\Kernel\TV\CLSched.exe
C:\PROGRA~1\AVG\AVG8\avgemc.exe
C:\WINDOWS\sm56hlpr.exe
C:\WINDOWS\RTHDCPL.EXE
C:\WINDOWS\system32\RUNDLL32.EXE
C:\Programmi\Java\jre1.5.0_04\bin\jusched.exe
C:\PROGRA~1\GOTOSO~1\VADERE~1\Vaderetro_oe.exe
C:\Programmi\Sonic\DigitalMedia LE v7\MyDVD LE\DetectorApp.exe
C:\Apps\Softex\OmniPass\scureapp.exe
C:\APPS\Powercinema\PCMService.exe
C:\apps\ABoard\ABoard.exe
C:\Programmi\Thomson\SpeedTouch USB\Dragdiag.exe
C:\Programmi\QuickTime\qttask.exe
C:\PROGRA~1\AVG\AVG8\avgtray.exe
C:\APPS\SMP\SmpSys.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\VoipBuster.com\VoipBuster\VoipBuster.exe
C:\Programmi\Windows Live\Messenger\MsnMsgr.Exe
C:\apps\ABoard\AOSD.exe
C:\Programmi\WinZip\WZQKPICK.EXE
C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\WINDOWS\System32\svchost.exe
C:\Programmi\RegCleaner\RegCleaner.exe
C:\Programmi\eMule\emule.exe
C:\Programmi\Windows Live\Messenger\usnsvc.exe
C:\Programmi\Mozilla Firefox\firefox.exe
D:\Documents and Settings\Lorenzo\Desktop\HiJackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Window Title = Microsoft Internet Explorer
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: WormRadar.com IESiteBlocker.NavFilter - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Programmi\AVG\AVG8\avgssie.dll
O2 - BHO: Guida per l'accesso a Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programmi\File comuni\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: (no name) - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Programmi\Google\GoogleToolbarNotifier\2.0.301.7164\swg.dll
O2 - BHO: Windows Live Toolbar Helper - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\Windows Live Toolbar\msntb.dll
O3 - Toolbar: Windows Live Toolbar - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Programmi\Windows Live Toolbar\msntb.dll
O4 - HKLM\..\Run: [IMJPMIG8.1] "C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE" /Spoil /RemAdvDef /Migration32
O4 - HKLM\..\Run: [PHIME2002ASync] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /SYNC
O4 - HKLM\..\Run: [PHIME2002A] C:\WINDOWS\system32\IME\TINTLGNT\TINTSETP.EXE /IMEName
O4 - HKLM\..\Run: [SMSERIAL] sm56hlpr.exe
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [Alcmtr] ALCMTR.EXE
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [SunJavaUpdateSched] C:\Programmi\Java\jre1.5.0_04\bin\jusched.exe
O4 - HKLM\..\Run: [Vade Retro Outlook Express] "C:\PROGRA~1\GOTOSO~1\VADERE~1\Vaderetro_oe.exe"
O4 - HKLM\..\Run: [DetectorApp] C:\Programmi\Sonic\DigitalMedia LE v7\MyDVD LE\DetectorApp.exe
O4 - HKLM\..\Run: [OmniPass] C:\Apps\Softex\OmniPass\scureapp.exe
O4 - HKLM\..\Run: [PCMService] "c:\APPS\Powercinema\PCMService.exe"
O4 - HKLM\..\Run: [ACTIVBOARD] c:\apps\ABoard\ABoard.exe
O4 - HKLM\..\Run: [SpeedTouch USB Diagnostics] "C:\Programmi\Thomson\SpeedTouch USB\Dragdiag.exe" /icon
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [ZoneAlarm Client] "C:\Programmi\Zone Labs\ZoneAlarm\zlclient.exe"
O4 - HKLM\..\Run: [AVG8_TRAY] C:\PROGRA~1\AVG\AVG8\avgtray.exe
O4 - HKCU\..\Run: [SmpcSys] C:\APPS\SMP\SmpSys.exe
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [updateMgr] C:\Programmi\Adobe\Acrobat 7.0\Reader\AdobeUpdateManager.exe AcRdB7_1_0
O4 - HKCU\..\Run: [VoipBuster] "C:\Programmi\VoipBuster.com\VoipBuster\VoipBuster.exe" -nosplash -minimized
O4 - HKCU\..\Run: [MsnMsgr] "C:\Programmi\Windows Live\Messenger\MsnMsgr.Exe" /background
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO LOCALE')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIZIO DI RETE')
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 - Global Startup: Avvio veloce di Adobe Reader.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: WinZip Quick Pick.lnk = C:\Programmi\WinZip\WZQKPICK.EXE
O8 - Extra context menu item: &Windows Live Search - res://C:\Programmi\Windows Live Toolbar\msntb.dll/search.htm
O8 - Extra context menu item: Add to Windows &Live Favorites - http://favorites.live.com/quickadd.aspx
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.5.0_04\bin\npjpi150_04.dll
O9 - Extra button: Inserisci blog - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Programmi\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: Inserisci &blog in Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Programmi\Windows Live\Writer\WriterBrowserExtension.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:\Programmi\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programmi\Messenger\msmsgs.exe
O14 - IERESET.INF: START_PAGE_URL=file://C:\APPS\IE\offline\it.htm
O16 - DPF: {0CCA191D-13A6-4E29-B746-314DEE697D83} (Facebook Photo Uploader 5) - http://upload.facebook.com/controls/FacebookPhotoUploader5.cab
O18 - Protocol: linkscanner - {F274614C-63F8-47D5-A4D1-FBDDE494F8D1} - C:\Programmi\AVG\AVG8\avgpp.dll
O20 - AppInit_DLLs: avgrsstx.dll
O23 - Service: AVG8 E-mail Scanner (avg8emc) - AVG Technologies CZ, s.r.o. - C:\PROGRA~1\AVG\AVG8\avgemc.exe
O23 - Service: AVG8 WatchDog (avg8wd) - AVG Technologies CZ, s.r.o. - C:\PROGRA~1\AVG\AVG8\avgwdsvc.exe
O23 - Service: CyberLink Background Capture Service (CBCS) (CLCapSvc) - Unknown owner - c:\APPS\Powercinema\Kernel\TV\CLCapSvc.exe
O23 - Service: CyberLink Task Scheduler (CTS) (CLSched) - Unknown owner - c:\APPS\Powercinema\Kernel\TV\CLSched.exe
O23 - Service: CyberLink Media Library Service - Cyberlink - c:\APPS\Powercinema\Kernel\CLML_NTService\CLMLServer.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Softex OmniPass Service (omniserv) - Softex Inc. - C:\Apps\Softex\OmniPass\Omniserv.exe
O23 - Service: Ulead Burning Helper (UleadBurningHelper) - Ulead Systems, Inc. - C:\Programmi\File comuni\Ulead Systems\DVD\ULCDRSvr.exe
O23 - Service: USBDeviceService - Unknown owner - C:\Programmi\Sonic\DigitalMedia LE v7\MyDVD LE\USBDeviceService.exe
O23 - Service: TrueVector Internet Monitor (vsmon) - Zone Labs, LLC - C:\WINDOWS\system32\ZoneLabs\vsmon.exe

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End of file - 8838 bytes

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Non riesco ad aprire una chiave di registro (HKEY_CURRENT_USER\Software\Skype\Phone\UI). Non riesco neanche a darmi le autorizzazioni per tale chiave, nè a eliminarla. Codice di errore: 1603.
La presenza di queste voci nel registro m'impedisce l'installazione di una qualsiasi versione di Skype. Grazie!
Borisba

Prova a eliminarla con questo tool:
Scarica questo:
http://malwarebytes.org/RegASSASSIN.exe
portati nella chiave interessata, clicca col tasto destro su di essa,quindi su "copia chiave con nome" e incolla sul riquadro di reg assassin, quindi clicca su "delete" e conferma le successive finestre di avviso con ok.
Riavvia il pc.
Il log è a posto.

Prova cosi:
● ti posizioni sulla chiave interessata.
● tasto destro del mouse e clicca su Autorizzazioni
● clicca su Aggiungi
● clicca su Avanzate
● clicca su Trova e, in basso seleziona, dall'elenco, Everyone
● conferma con OK e alla successiva richiesta, conferma, nuovamente con OK

a questo punto, verrai rimandato alla scheda Autorizzazioni
quindi prosegui in questo modo:
● spunta la voce Controllo completo (automaticamente verrà messa anche la spunta alla voce In lettura)
● conferma con OK
verrai rimandato alla chiave interessata
● rimuovila.

Affinché le modifiche apportate abbiano effetto, è necessario riavviare il Computer.

Prova a cliccare invece di Everyone, selezionare SYSTEM.