Ciao io ho un problema con il processo EXPLORER.exe si blocca ogni volta che apro una cartella qualsiasi che contenga documenti.. vi posto il log di HIJACK

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 13.08.46, on 18/01/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)
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:\Programmi\Intel\Wireless\Bin\EvtEng.exe
C:\Programmi\Intel\Wireless\Bin\S24EvMon.exe
C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe
C:\Programmi\File comuni\Symantec Shared\AppCore\AppSvc32.exe
C:\WINDOWS\system32\spoolsv.exe
c:\programmi\file comuni\logitech\lvmvfm\LVPrcSrv.exe
C:\Acer\Empowering Technology\ePerformance\MemCheck.exe
C:\Programmi\Autodesk\Data Management Server 2008\Server\Dispatch\Connectivity.WindowsService.JobDispatch.exe
C:\Programmi\Autodesk\Data Management Server 2008\Server\Webserver\Connectivity.EDMWS.Server.exe
c:\Programmi\WIDCOMM\Bluetooth Software\bin\btwdins.exe
C:\Programmi\Acer\Acer Arcade\Kernel\TV\CLCapSvc.exe
C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe
C:\Programmi\Acer\Acer Arcade\Kernel\CLML_NTService\CLMLServer.exe
C:\Programmi\Acer\Acer Arcade\Kernel\CLML_NTService\CLMLService.exe
C:\Programmi\File comuni\LightScribe\LSSrvc.exe
C:\Programmi\Mediafour\MacDrive 7\MacDriveService.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\Programmi\Intel\Wireless\Bin\RegSrvc.exe
C:\Programmi\CyberLink\Shared Files\RichVideo.exe
C:\Programmi\Microsoft SQL Server\90\Shared\sqlwriter.exe
C:\WINDOWS\system32\svchost.exe
C:\Programmi\Symantec\LiveUpdate\ALUSchedulerSvc.exe
C:\Programmi\Acer\Acer Arcade\Kernel\TV\CLSched.exe
C:\WINDOWS\system32\wbem\wmiapsrv.exe
C:\Acer\Empowering Technology\eRecovery\eRAgent.exe
C:\WINDOWS\system32\RUNDLL32.EXE
C:\WINDOWS\RTHDCPL.EXE
C:\Programmi\Acer\Acer Arcade\PCMService.exe
C:\Programmi\Synaptics\SynTP\SynTPEnh.exe
C:\Acer\Empowering Technology\eDataSecurity\eDSloader.exe
C:\DOCUME~1\ROBERT~1\IMPOST~1\Temp\RtkBtMnt.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\rundll32.exe
C:\Acer\Empowering Technology\ePower\ePower_DMC.exe
C:\PROGRA~1\LAUNCH~1\LManager.exe
C:\WINDOWS\system32\wbem\unsecapp.exe
C:\WINDOWS\system32\LVCOMSX.EXE
C:\Programmi\Acer\OrbiCam\CameraAssistant.exe
C:\WINDOWS\system32\ElkCtrl.exe
C:\Programmi\File comuni\Symantec Shared\ccApp.exe
C:\Programmi\HP\HP Software Update\HPWuSchd2.exe
C:\Programmi\Java\jre1.6.0_03\bin\jusched.exe
C:\Programmi\Windows Live\Family Safety\fssui.exe
C:\Programmi\Mediafour\MacDrive 7\MacDrive.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Programmi\Windows Live\Messenger\MsnMsgr.Exe
C:\Programmi\File comuni\Ahead\Lib\NMBgMonitor.exe
C:\Acer\Empowering Technology\Acer.Empowering.Framework.Launcher.exe
C:\Programmi\WIDCOMM\Bluetooth Software\BTTray.exe
C:\Programmi\HP\Digital Imaging\bin\hpqtra08.exe
C:\Programmi\Microsoft SQL Server\80\Tools\Binn\sqlmangr.exe
C:\Programmi\HP\Digital Imaging\bin\hpqgalry.exe
C:\Programmi\File comuni\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\Programmi\Yahoo!\Messenger\ymsgr_tray.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\WINDOWS\system32\drwtsn32.exe
C:\WINDOWS\system32\drwtsn32.exe
C:\WINDOWS\system32\drwtsn32.exe
C:\Programmi\Mozilla Firefox\firefox.exe
C:\WINDOWS\system32\drwtsn32.exe
C:\WINDOWS\system32\drwtsn32.exe
C:\WINDOWS\explorer.exe
C:\Documents and Settings\Roberto Verduci\Desktop\HiJackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.google.it/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.yahoo.com/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://us.rd.yahoo.com/customize/ie/defaults/su/msgr8/*http://www.yahoo.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = http://us.rd.yahoo.com/customize/ie/defaults/sb/msgr8/*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/msgr8/*http://www.yahoo.com
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.yahoo.com/
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://www.ntius.com/register.cfm
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Collegamenti
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programmi\Yahoo!\Companion\Installs\cpn\yt.dll (file missing)
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programmi\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {1E8A6170-7264-4D0F-BEAE-D42A53123C75} - C:\Programmi\File comuni\Symantec Shared\coShared\Browser\1.5\NppBho.dll
O2 - BHO: Windows Live OneCare Family Safety Browser Helper - {4f3ed5cd-0726-42a9-87f5-d13f3d2976ac} - C:\Programmi\Windows Live\Family Safety\fssbho.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programmi\Java\jre1.6.0_03\bin\ssv.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
O3 - Toolbar: Acer eDataSecurity Management - {5CBE3B7C-1E47-477e-A7DD-396DB0476E29} - C:\WINDOWS\system32\eDStoolbar.dll
O3 - Toolbar: Show Norton Toolbar - {90222687-F593-4738-B738-FBEE9C7B26DF} - C:\Programmi\File comuni\Symantec Shared\coShared\Browser\1.5\UIBHO.dll
O4 - HKLM\..\Run: [LaunchApp] Alaunch
O4 - HKLM\..\Run: [nwiz] nwiz.exe /install
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\WINDOWS\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [RTHDCPL] RTHDCPL.EXE
O4 - HKLM\..\Run: [AzMixerSel] C:\Programmi\Realtek\InstallShield\AzMixerSel.exe
O4 - HKLM\..\Run: [PCMService] "C:\Programmi\Acer\Acer Arcade\PCMService.exe"
O4 - HKLM\..\Run: [ntiMUI] C:\Programmi\NewTech Infosystems\NTI CD & DVD-Maker 7\ntiMUI.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Programmi\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [eDataSecurity Loader] C:\Acer\Empowering Technology\eDataSecurity\eDSloader.exe 1
O4 - HKLM\..\Run: [Acer ePresentation HPD] C:\Acer\Empowering Technology\ePresentation\ePresentation.exe
O4 - HKLM\..\Run: [IMJPMIG8.1] "C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE" /Spoil /RemAdvDef /Migration32
O4 - HKLM\..\Run: [MSPY2002] C:\WINDOWS\system32\IME\PINTLGNT\ImScInst.exe /SYNC
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: [BluetoothAuthenticationAgent] rundll32.exe bthprops.cpl,,BluetoothAuthenticationAgent
O4 - HKLM\..\Run: [ePower_DMC] C:\Acer\Empowering Technology\ePower\ePower_DMC.exe
O4 - HKLM\..\Run: [Boot] C:\Acer\Empowering Technology\ePower\Boot.exe
O4 - HKLM\..\Run: [LManager] C:\PROGRA~1\LAUNCH~1\LManager.exe
O4 - HKLM\..\Run: [eRecoveryService] C:\Acer\Empowering Technology\eRecovery\eRAgent.exe
O4 - HKLM\..\Run: [LVCOMSX] C:\WINDOWS\system32\LVCOMSX.EXE
O4 - HKLM\..\Run: [LogitechCameraAssistant] C:\Programmi\Acer\OrbiCam\CameraAssistant.exe
O4 - HKLM\..\Run: [LogitechVideo[inspector]] C:\Programmi\Acer\OrbiCam\InstallHelper.exe /inspect
O4 - HKLM\..\Run: [LogitechCameraService(E)] C:\WINDOWS\system32\ElkCtrl.exe /automation
O4 - HKLM\..\Run: [NeroFilterCheck] C:\Programmi\File comuni\Ahead\Lib\NeroCheck.exe
O4 - HKLM\..\Run: [ccApp] "C:\Programmi\File comuni\Symantec Shared\ccApp.exe"
O4 - HKLM\..\Run: [osCheck] "C:\Programmi\Norton Internet Security\osCheck.exe"
O4 - HKLM\..\Run: [Symantec PIF AlertEng] "C:\Programmi\File comuni\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe" /a /m "C:\Programmi\File comuni\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\AlertEng.dll"
O4 - HKLM\..\Run: [HP Software Update] "C:\Programmi\HP\HP Software Update\HPWuSchd2.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programmi\Java\jre1.6.0_03\bin\jusched.exe"
O4 - HKLM\..\Run: [fssui] "C:\Programmi\Windows Live\Family Safety\fssui.exe" -autorun
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programmi\QuickTime\QTTask.exe" -atboottime
O4 - HKLM\..\Run: [{B179023B-6238-4499-8F26-CD73E9D90E0A}] "C:\Programmi\Mediafour\MacDrive 7\MacDrive.exe"
O4 - HKLM\..\Run: [MDGetStarted.exe] "C:\Programmi\Mediafour\MacDrive 7\MDGetStarted.exe" /auto
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MsnMsgr] "C:\Programmi\Windows Live\Messenger\MsnMsgr.Exe" /background
O4 - HKCU\..\Run: [updateMgr] c:\Programmi\Adobe\Acrobat 7.0\Reader\AdobeUpdateManager.exe AcRdB7_0_9
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Programmi\File comuni\Ahead\Lib\NMBgMonitor.exe"
O4 - HKCU\..\Run: [Yahoo! Pager] "C:\Programmi\Yahoo!\Messenger\YahooMessenger.exe" -quiet
O4 - HKCU\..\Run: [RocketDock] "C:\Programmi\RocketDock\RocketDock.exe"
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: Acer Empowering Technology.lnk = ?
O4 - Global Startup: BTTray.lnk = ?
O4 - Global Startup: Adobe Reader Speed Launch.lnk = C:\Programmi\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Programmi\HP\Digital Imaging\bin\hpqtra08.exe
O4 - Global Startup: Avvio rapido di HP Image Zone.lnk = C:\Programmi\HP\Digital Imaging\bin\hpqthb08.exe
O4 - Global Startup: Gestione servizi.lnk = C:\Programmi\Microsoft SQL Server\80\Tools\Binn\sqlmangr.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Invia a periferica &Bluetooth... - c:\Programmi\WIDCOMM\Bluetooth Software\btsendto_ie_ctx.htm
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_03\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programmi\Java\jre1.6.0_03\bin\ssv.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: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\Office12\REFIEBAR.DLL
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
O16 - DPF: {5C051655-FCD5-4969-9182-770EA5AA5565} (Solitaire Showdown Class) - http://messenger.zone.msn.com/binary/SolitaireShowdown.cab56986.cab
O16 - DPF: {5D6F45B3-9043-443D-A792-115447494D24} (UnoCtrl Class) - http://messenger.zone.msn.com/IT-IT/a-UNO1/GAME_UNO1.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) - http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O23 - Service: Memory Check Service (AcerMemUsageCheckService) - Acer Inc. - C:\Acer\Empowering Technology\ePerformance\MemCheck.exe
O23 - Service: Autodesk Data Management Job Dispatch - Autodesk - C:\Programmi\Autodesk\Data Management Server 2008\Server\Dispatch\Connectivity.WindowsService.JobDispatch.exe
O23 - Service: Autodesk EDM Server - Autodesk - C:\Programmi\Autodesk\Data Management Server 2008\Server\Webserver\Connectivity.EDMWS.Server.exe
O23 - Service: Autodesk Licensing Service - Autodesk - C:\Programmi\File comuni\Autodesk Shared\Service\AdskScSrv.exe
O23 - Service: Bluetooth Service (btwdins) - Broadcom Corporation. - c:\Programmi\WIDCOMM\Bluetooth Software\bin\btwdins.exe
O23 - Service: Symantec Event Manager (ccEvtMgr) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe
O23 - Service: Symantec Settings Manager (ccSetMgr) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe
O23 - Service: CyberLink Background Capture Service (CBCS) (CLCapSvc) - Unknown owner - C:\Programmi\Acer\Acer Arcade\Kernel\TV\CLCapSvc.exe
O23 - Service: CyberLink Task Scheduler (CTS) (CLSched) - Unknown owner - C:\Programmi\Acer\Acer Arcade\Kernel\TV\CLSched.exe
O23 - Service: Symantec Lic NetConnect service (CLTNetCnService) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe
O23 - Service: COM Host (comHost) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\VAScanner\comHost.exe
O23 - Service: CyberLink Media Library Service - Cyberlink - C:\Programmi\Acer\Acer Arcade\Kernel\CLML_NTService\CLMLServer.exe
O23 - Service: Intel(R) PROSet/Wireless Event Log (EvtEng) - Intel Corporation - C:\Programmi\Intel\Wireless\Bin\EvtEng.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programmi\File comuni\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: Symantec IS Password Validation (ISPwdSvc) - Symantec Corporation - C:\Programmi\Norton Internet Security\isPwdSvc.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Programmi\File comuni\LightScribe\LSSrvc.exe
O23 - Service: LiveUpdate - Symantec Corporation - C:\PROGRA~1\Symantec\LIVEUP~1\LUCOMS~1.EXE
O23 - Service: LiveUpdate Notice Service Ex (LiveUpdate Notice Ex) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\ccSvcHst.exe
O23 - Service: LiveUpdate Notice Service - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\PIF\{B8E1DD85-8582-4c61-B58F-2F227FCA9A08}\PIFSvc.exe
O23 - Service: Logitech Process Monitor (LVPrcSrv) - Logitech - c:\programmi\file comuni\logitech\lvmvfm\LVPrcSrv.exe
O23 - Service: MacDriveService - Mediafour Corporation - C:\Programmi\Mediafour\MacDrive 7\MacDriveService.exe
O23 - Service: NBService - Nero AG - C:\Programmi\Nero\Nero 7\Nero BackItUp\NBService.exe
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\WINDOWS\system32\nvsvc32.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: Intel(R) PROSet/Wireless Registry Service (RegSrvc) - Intel Corporation - C:\Programmi\Intel\Wireless\Bin\RegSrvc.exe
O23 - Service: Cyberlink RichVideo Service(CRVS) (RichVideo) - Unknown owner - C:\Programmi\CyberLink\Shared Files\RichVideo.exe
O23 - Service: Remote Packet Capture Protocol v.0 (experimental) (rpcapd) - CACE Technologies - C:\Programmi\WinPcap\rpcapd.exe
O23 - Service: Intel(R) PROSet/Wireless Service (S24EventMonitor) - Intel Corporation - C:\Programmi\Intel\Wireless\Bin\S24EvMon.exe
O23 - Service: Symantec Core LC - Unknown owner - C:\Programmi\File comuni\Symantec Shared\CCPD-LC\symlcsvc.exe
O23 - Service: Symantec AppCore Service (SymAppCore) - Symantec Corporation - C:\Programmi\File comuni\Symantec Shared\AppCore\AppSvc32.exe
O23 - Service: Utilità di pianificazione di LiveUpdate automatico - Symantec Corporation - C:\Programmi\Symantec\LiveUpdate\ALUSchedulerSvc.exe

--
End of file - 15537 bytes

Ciao verdu86

Disattiva il ripristino di configurazione, leggi qui come fare;http://guide.aiutamici.com/guide?C1=7&C2=68&ID=80121
Riavvia in modalità provvisoria, leggi qui come fare http://guide.aiutamici.com/guide?C1=7&C2=68&ID=80122
apri HIJAC THIS ed elimina come indicato in questo articolo http://guide.aiutamici.com/software?ID=11175

Fixa questa voce: O4 - HKLM\..\Run: [MDGetStarted.exe] "C:\Programmi\Mediafour\MacDrive 7\MDGetStarted.exe" /auto

Vai in "C:\Programmi\Mediafour\MacDrive 7\MDGetStarted.exe" /auto
elimina le voci in rosso:MDGetStarted.exe" /auto(per me sarebbe da cancellare tutta la cartella, però per il momento accontentiamoci di eliminare il file infetto).

Elimina i file inutili del sistema utilizzando questo programma http://www.aiutamici.com/software?ID=11223
Utilizza questo programma per eliminare eventuali spyware http://www.aiutamici.com/software?ID=10831
Sempre in modalità provvisoria fai una scansione Antivirus,
se non hai un antivirus, utilizza questo programma http://www.aiutamici.com/software?ID=11485

Quindi riavvia il computer e controlla se il problema e risolto, se e tutto OK riattiva il ripristino configurazione disattivato all'inizio di questa procedura e crea un nuovo punto di ripristino, leggi qui http://guide.aiutamici.com/guide?C1=7&C2=16&ID=80161

Vediamo se và meglio.

Ciao.

Ciao.

Io ne vedo 2 di cartelle, una è questa:O4 - HKLM\..\Run: [{B179023B-6238-4499-8F26-CD73E9D90E0A}] "C:\Programmi\Mediafour\MacDrive 7\MacDrive.exe"

L'altra è questa: O4 - HKLM\..\Run: [MDGetStarted.exe] "C:\Programmi\Mediafour\MacDrive 7\MDGetStarted.exe" /auto

Se le hai installate Tu (tutte 2) và bene, non le fixare.

Nell'analisi on-line,davano grosse possibilità che la seconda( O4 - HKLM\..\Run: [MDGetStarted.exe] "C:\Programmi\Mediafour\MacDrive 7\MDGetStarted.exe" /auto
fosse un troyan.....

Prova con Prevx .
Non ti elimina niente,però se hai qualche Malware te lo trova di sicuro,e in più ti dice dov'è.

http://info.prevx.com/downloadprevx2.asp

Puoi provare in MODALITA PROVVISORIA anche questo: http://www.tgsoft.it/italy/download.htm
Aggiornalo (clicca sulla parabola in alto)
Per 30gg è gratis,(e elimina i virus) poi te li segnala,ma non te li toglie.

provalo e fammi sapere.