ciao a tutti,
chiedo cortesemente l'aiuto di qualcuno.

è da un paio di mesi oramai che sul mio toshiba Satellite L755 con win7 ho il seguente problema:
quando connetto al pc un harddisk esterno o una pennetta o qualsiasi altra cosa, mi capita di non riuscire a vederli ( in Computer, leggo il numero delle cose collegate ma nn riesco a leggerle)..a meno che nn riavvi il pc.
Sul desktop, invece, è la cartella del cestino che scompare... ma con semplice F5 riappare immediatamente.
Ho scansito sia con malwarebyte anti -malware ..e nn trova niente; Superantispyware..e niente.
provato a far partire Hijackthis e mi appare l'immagine che non riesco ad allegare (se mi spegate come si fa) ...e dopo l'ok continua e termina il log. (non riesco ad allegarvi screenshot e log).
E' diventato davvero fastidioso, vi giuro.
C'è qualcuno di buon cuore pronto ad aiutarmi?

grazie infinite fin da subito

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Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 14:41:35, on 27/09/2012
Platform: Windows 7 SP1 (WinNT 6.00.3505)
MSIE: Internet Explorer v9.00 (9.00.8112.16450)
Boot mode: Normal

Running processes:
C:\PROGRAM FILES (X86)\PANDA SECURITY\PANDA INTERNET SECURITY 2012\WebProxy.exe
C:\Program Files (x86)\Malwarebytes' Anti-Malware\mbamgui.exe
C:\Program Files (x86)\Samsung\Kies\Kies.exe
C:\Program Files (x86)\TOSHIBA\TOSHIBA Sleep Utility\TSleepSrv.exe
C:\Program Files (x86)\Garmin\Lifetime Updater\GarminLifetime.exe
C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe
C:\Program Files (x86)\Samsung\Kies\KiesTrayAgent.exe
C:\Program Files (x86)\Elaborate Bytes\VirtualCloneDrive\VCDDaemon.exe
C:\Program Files (x86)\TOSHIBA\ConfigFree\NDSTray.exe
C:\Program Files (x86)\TOSHIBA\ConfigFree\CFSwMgr.exe
C:\Program Files (x86)\Common Files\microsoft shared\virtualization handler\cvh.exe
C:\Program Files (x86)\Common Files\microsoft shared\virtualization handler\OfficeVirt.exe
C:\Program Files (x86)\Panda Security\Panda Internet Security 2012\ApVxdWin.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
C:\Program Files (x86)\Trend Micro\HiJackThis\HiJackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://search.conduit.com?SearchSource=10&ctid=CT2475029
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 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = C:\Windows\SysWOW64\blank.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: (no name) - {a1e75a0e-4397-4ba8-bb50-e19fb66890f4} - (no file)
F2 - REG:system.ini: UserInit=userinit.exe
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files (x86)\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files (x86)\Java\jre7\bin\ssv.dll
O2 - BHO: Guida per l'accesso a Windows Live ID - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: SkypeIEPluginBHO - {AE805869-2E5C-4ED4-8F7B-F1F7851A4497} - C:\Program Files (x86)\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files (x86)\Java\jre7\bin\jp2ssv.dll
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [NBAgent] "c:\Program Files (x86)\Nero\Nero 10\Nero BackItUp\NBAgent.exe" /WinStart
O4 - HKLM\..\Run: [TSleepSrv] %ProgramFiles(x86)%\TOSHIBA\TOSHIBA Sleep Utility\TSleepSrv.exe
O4 - HKLM\..\Run: [ToshibaServiceStation] "C:\Program Files (x86)\TOSHIBA\TOSHIBA Service Station\ToshibaServiceStation.exe" /hide:60
O4 - HKLM\..\Run: [APVXDWIN] "C:\Program Files (x86)\Panda Security\Panda Internet Security 2012\APVXDWIN.EXE" /s
O4 - HKLM\..\Run: [SCANINICIO] "C:\Program Files (x86)\Panda Security\Panda Internet Security 2012\Inicio.exe"
O4 - HKLM\..\Run: [Garmin Lifetime Updater] C:\Program Files (x86)\Garmin\Lifetime Updater\GarminLifetime.exe /StartMinimized
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe"
O4 - HKLM\..\Run: [KiesTrayAgent] C:\Program Files (x86)\Samsung\Kies\KiesTrayAgent.exe
O4 - HKLM\..\Run: [VirtualCloneDrive] "C:\Program Files (x86)\Elaborate Bytes\VirtualCloneDrive\VCDDaemon.exe" /s
O4 - HKCU\..\Run: [TOPI.EXE] C:\Program Files (x86)\TOSHIBA\TOSHIBA Online Product Information\topi.exe /STAR
O4 - HKCU\..\Run: [KiesPreload] C:\Program Files (x86)\Samsung\Kies\Kies.exe /preload
O4 - HKCU\..\Run: [Facebook Update] "C:\Users\dario\AppData\Local\Facebook\Update\FacebookUpdate.exe" /c /nocrashserver
O4 - HKUS\S-1-5-18\..\Run: [TOPI.EXE] C:\Program Files (x86)\TOSHIBA\TOSHIBA Online Product Information\topi.exe /STARTUP (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [TOPI.EXE] C:\Program Files (x86)\TOSHIBA\TOSHIBA Online Product Information\topi.exe /STARTUP (User 'Default user')
O4 - .DEFAULT User Startup: TRDCReminder.lnk = C:\Program Files (x86)\TOSHIBA\TRDCReminder\TRDCReminder.exe (User 'Default user')
O4 - Startup: TRDCReminder.lnk = C:\Program Files (x86)\TOSHIBA\TRDCReminder\TRDCReminder.exe
O4 - Global Startup: Toshiba Places Icon Utility.lnk = C:\Program Files\TOSHIBA\TOSHIBA Places Icon Utility\TosDIMonitor.exe
O8 - Extra context menu item: Aggiungi a TOSHIBA Bulletin Board - res://C:\Program Files\TOSHIBA\BulletinBoard\TosBBCom.dll/1000
O9 - Extra button: @C:\Program Files (x86)\Windows Live\Writer\WindowsLiveWriterShortcuts.dll,-1004 - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files (x86)\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: @C:\Program Files (x86)\Windows Live\Writer\WindowsLiveWriterShortcuts.dll,-1003 - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files (x86)\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra button: Skype Click to Call - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files (x86)\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O9 - Extra button: @C:\Program Files\TOSHIBA\BulletinBoard\TosNcUi.dll,-229 - {97F922BD-8563-4184-87EE-8C4ACA438823} - C:\Program Files\TOSHIBA\BulletinBoard\TosBBCom.dll
O9 - Extra 'Tools' menuitem: @C:\Program Files\TOSHIBA\BulletinBoard\TosNcUi.dll,-228 - {97F922BD-8563-4184-87EE-8C4ACA438823} - C:\Program Files\TOSHIBA\BulletinBoard\TosBBCom.dll
O10 - Unknown file in Winsock LSP: c:\program files (x86)\common files\microsoft shared\windows live\wlidnsp.dll
O10 - Unknown file in Winsock LSP: c:\program files (x86)\common files\microsoft shared\windows live\wlidnsp.dll
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O18 - Protocol: skype-ie-addon-data - {91774881-D725-4E58-B298-07617B9B86A8} - C:\Program Files (x86)\Skype\Toolbars\Internet Explorer\skypeieplugin.dll
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~2\COMMON~1\Skype\SKYPE4~1.DLL
O18 - Protocol: wlpg - {E43EF6CD-A37A-4A9B-9E6F-83F89B8E6324} - C:\Program Files (x86)\Windows Live\Photo Gallery\AlbumDownloadProtocolHandler.dll
O23 - Service: SAS Core Service (!SASCORE) - SUPERAntiSpyware.com - C:\Program Files\SUPERAntiSpyware\SASCORE64.EXE
O23 - Service: Adobe Acrobat Update Service (AdobeARMservice) - Adobe Systems Incorporated - C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\armsvc.exe
O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\windows\System32\alg.exe (file missing)
O23 - Service: ConfigFree WiMAX Service (cfWiMAXService) - TOSHIBA CORPORATION - C:\Program Files (x86)\TOSHIBA\ConfigFree\CFIWmxSvcs64.exe
O23 - Service: ConfigFree Service - TOSHIBA CORPORATION - C:\Program Files (x86)\TOSHIBA\ConfigFree\CFSvcs.exe
O23 - Service: @%SystemRoot%\system32\efssvc.dll,-100 (EFS) - Unknown owner - C:\windows\System32\lsass.exe (file missing)
O23 - Service: @%systemroot%\system32\fxsresm.dll,-118 (Fax) - Unknown owner - C:\windows\system32\fxssvc.exe (file missing)
O23 - Service: GamesAppService - WildTangent, Inc. - C:\Program Files (x86)\WildTangent Games\App\GamesAppService.exe
O23 - Service: Google Update Service (gupdate) (gupdate) - Google Inc. - C:\Program Files (x86)\Google\Update\GoogleUpdate.exe
O23 - Service: Google Update Service (gupdatem) (gupdatem) - Google Inc. - C:\Program Files (x86)\Google\Update\GoogleUpdate.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files (x86)\Common Files\InstallShield\Driver\1150\Intel 32\IDriverT.exe
O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\windows\system32\lsass.exe (file missing)
O23 - Service: Intel(R) Management and Security Application Local Management Service (LMS) - Intel Corporation - C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\LMS\LMS.exe
O23 - Service: MBAMScheduler - Malwarebytes Corporation - C:\Program Files (x86)\Malwarebytes' Anti-Malware\mbamscheduler.exe
O23 - Service: MBAMService - Malwarebytes Corporation - C:\Program Files (x86)\Malwarebytes' Anti-Malware\mbamservice.exe
O23 - Service: @comres.dll,-2797 (MSDTC) - Unknown owner - C:\windows\System32\msdtc.exe (file missing)
O23 - Service: @c:\Program Files (x86)\Nero\Update\NASvc.exe,-200 (NAUpdate) - Nero AG - c:\Program Files (x86)\Nero\Update\NASvc.exe
O23 - Service: @%SystemRoot%\System32\netlogon.dll,-102 (Netlogon) - Unknown owner - C:\windows\system32\lsass.exe (file missing)
O23 - Service: NVIDIA Driver Helper Service (NVSvc) - Unknown owner - C:\windows\system32\nvvsvc.exe (file missing)
O23 - Service: Panda Software Controller - Panda Security, S.L. - C:\Program Files (x86)\Panda Security\Panda Internet Security 2012\PsCtrls.exe
O23 - Service: Panda Function Service (PAVFNSVR) - Unknown owner - C:\Program Files (x86)\Panda Security\Panda Internet Security 2012\PavFnSvr.exe
O23 - Service: Panda Process Protection Service (PavPrSrv) - Unknown owner - C:\Program Files (x86)\Common Files\Panda Security\PavShld\pavprsrv.exe
O23 - Service: Panda On-Access Anti-Malware Service (PAVSRV) - Panda Security, S.L. - C:\Program Files (x86)\Panda Security\Panda Internet Security 2012\pavsrvx86.exe
O23 - Service: @%systemroot%\system32\psbase.dll,-300 (ProtectedStorage) - Unknown owner - C:\windows\system32\lsass.exe (file missing)
O23 - Service: Panda Host Service (PSHost) - Unknown owner - C:\Program Files (x86)\Panda Security\Panda Internet Security 2012\Firewall\PSHOST.EXE
O23 - Service: Panda IManager Service (PSIMSVC) - Panda Security S.L. - C:\Program Files (x86)\Panda Security\Panda Internet Security 2012\PsImSvc.exe
O23 - Service: Panda PSK service (PskSvcRetail) - Panda Security, S.L. - C:\Program Files (x86)\Panda Security\Panda Internet Security 2012\PskSvc.exe
O23 - Service: @%systemroot%\system32\Locator.exe,-2 (RpcLocator) - Unknown owner - C:\windows\system32\locator.exe (file missing)
O23 - Service: @%SystemRoot%\system32\samsrv.dll,-1 (SamSs) - Unknown owner - C:\windows\system32\lsass.exe (file missing)
O23 - Service: Skype C2C Service - Skype Technologies S.A. - C:\ProgramData\Skype\Toolbars\Skype C2C Service\c2c_service.exe
O23 - Service: Skype Updater (SkypeUpdate) - Skype Technologies - C:\Program Files (x86)\Skype\Updater\Updater.exe
O23 - Service: @%SystemRoot%\system32\snmptrap.exe,-3 (SNMPTRAP) - Unknown owner - C:\windows\System32\snmptrap.exe (file missing)
O23 - Service: @%systemroot%\system32\spoolsv.exe,-1 (Spooler) - Unknown owner - C:\windows\System32\spoolsv.exe (file missing)
O23 - Service: @%SystemRoot%\system32\sppsvc.exe,-101 (sppsvc) - Unknown owner - C:\windows\system32\sppsvc.exe (file missing)
O23 - Service: NVIDIA Stereoscopic 3D Driver Service (Stereo Service) - NVIDIA Corporation - C:\Program Files (x86)\NVIDIA Corporation\3D Vision\nvSCPAPISvr.exe
O23 - Service: Notebook Performance Tuning Service (TEMPRO) (TemproMonitoringService) - Toshiba Europe GmbH - C:\Program Files (x86)\Toshiba TEMPRO\TemproSvc.exe
O23 - Service: TMachInfo - TOSHIBA Corporation - C:\Program Files (x86)\TOSHIBA\TOSHIBA Service Station\TMachInfo.exe
O23 - Service: TOSHIBA Optical Disc Drive Service (TODDSrv) - Unknown owner - C:\windows\system32\TODDSrv.exe (file missing)
O23 - Service: TOSHIBA Power Saver (TosCoSrv) - TOSHIBA Corporation - C:\Program Files\TOSHIBA\Power Saver\TosCoSrv.exe
O23 - Service: TOSHIBA Bluetooth Service - TOSHIBA CORPORATION - C:\Program Files (x86)\Toshiba\Bluetooth Toshiba Stack\TosBtSrv.exe
O23 - Service: TOSHIBA eco Utility Service - TOSHIBA Corporation - C:\Program Files\TOSHIBA\TECO\TecoService.exe
O23 - Service: TOSHIBA HDD SSD Alert Service - TOSHIBA Corporation - C:\Program Files\TOSHIBA\TOSHIBA HDD SSD Alert\TosSmartSrv.exe
O23 - Service: TPCH Service (TPCHSrv) - TOSHIBA Corporation - C:\Program Files\TOSHIBA\TPHM\TPCHSrv.exe
O23 - Service: Panda TPSrv (TPSrv) - Panda Security, S.L. - C:\Program Files (x86)\Panda Security\Panda Internet Security 2012\TPSrvWow.exe
O23 - Service: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\windows\system32\UI0Detect.exe (file missing)
O23 - Service: Intel(R) Management and Security Application User Notification Service (UNS) - Intel Corporation - C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\UNS\UNS.exe
O23 - Service: @%SystemRoot%\system32\vaultsvc.dll,-1003 (VaultSvc) - Unknown owner - C:\windows\system32\lsass.exe (file missing)
O23 - Service: @%SystemRoot%\system32\vds.exe,-100 (vds) - Unknown owner - C:\windows\System32\vds.exe (file missing)
O23 - Service: @%systemroot%\system32\vssvc.exe,-102 (VSS) - Unknown owner - C:\windows\system32\vssvc.exe (file missing)
O23 - Service: @%SystemRoot%\system32\Wat\WatUX.exe,-601 (WatAdminSvc) - Unknown owner - C:\windows\system32\Wat\WatAdminSvc.exe (file missing)
O23 - Service: @%systemroot%\system32\wbengine.exe,-104 (wbengine) - Unknown owner - C:\windows\system32\wbengine.exe (file missing)
O23 - Service: @%Systemroot%\system32\wbem\wmiapsrv.exe,-110 (wmiApSrv) - Unknown owner - C:\windows\system32\wbem\WmiApSrv.exe (file missing)
O23 - Service: @%PROGRAMFILES%\Windows Media Player\wmpnetwk.exe,-101 (WMPNetworkSvc) - Unknown owner - C:\Program Files (x86)\Windows Media Player\wmpnetwk.exe (file missing)

--
End of file - 14516 bytes

Ciao.
E dopo "un paio di mesi" ti è venuta all'improvviso tutta questa fretta?
Fra l'altro, visto che i vari tool non hanno trovato niente, e che il log a parte questa voce:

che ritengo ininfluente al tuo problema; la sezione più adatta sia questa:
http://forum.aiutamici.com/yaf_topics8_Problemi-Informatici.aspx
Ciao.