Tenho aqui um computador que teve um problema semelhante, tendo também desaparecido o ícone do Disco Local (C) no Meu Computador, embora seja possível aceder ás pastas existentes nele por outros atalhos...
Corri o CCleaner, que sugere que apague cerca de 460MB de ficheiros....Devo faze-lo, é seguro???
O hijackthis detectou isto:
Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 17:11, on 02-08-2008
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\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\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\Explorer.EXE
C:\Programas\Kaspersky Lab\Kaspersky Internet Security 7.0\avp.exe
C:\Programas\Bonjour\mDNSResponder.exe
C:\WINDOWS\system32\CTsvcCDA.exe
C:\Programas\Ficheiros comuns\LightScribe\LSSrvc.exe
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\PnkBstrA.exe
C:\Programas\XpertVision\TBPanel.exe
C:\Programas\Creative\SBAudigy2\Surround Mixer\CTSysVol.exe
C:\Programas\Creative\SBAudigy2\DVDAudio\CTDVDDet.EXE
C:\WINDOWS\system32\CTHELPER.EXE
C:\Programas\DAEMON Tools\daemon.exe
C:\Programas\Logitech\iTouch\iTouch.exe
C:\PROGRA~1\Logitech\MOUSEW~1\SYSTEM\EM_EXEC.EXE
C:\Programas\CyberLink\PowerDVD\PDVDServ.exe
C:\Programas\HP\hpcoretech\hpcmpmgr.exe
C:\Programas\Java\jre1.6.0_01\bin\jusched.exe
C:\Programas\iTunes\iTunesHelper.exe
C:\Programas\Microsoft Office\Office12\GrooveMonitor.exe
C:\Programas\Ficheiros comuns\PCSuite\DataLayer\DataLayer.exe
C:\Programas\Nokia\Nokia PC Suite 6\LaunchApplication.exe
C:\Programas\Kaspersky Lab\Kaspersky Internet Security 7.0\avp.exe
C:\WINDOWS\system32\ctfmon.exe
C:\PROGRA~1\FICHEI~1\PCSuite\Services\SERVIC~1.EXE
C:\PROGRA~1\Nero\NEROPH~1\data\xtras\mssysmgr.exe
C:\Programas\CyberLink\Shared Files\RichVideo.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\wdfmgr.exe
C:\Programas\HP\Digital Imaging\bin\hpqtra08.exe
C:\WINDOWS\system32\MsPMSPSv.exe
C:\Programas\iPod\bin\iPodService.exe
C:\WINDOWS\System32\alg.exe
C:\Programas\uTorrent\utorrent.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Programas\Windows Live\Messenger\usnsvc.exe
C:\Programas\Windows Live\Messenger\msnmsgr.exe
C:\Programas\Internet Explorer\IEXPLORE.EXE
C:\Programas\Mozilla Firefox\firefox.exe
C:\Programas\Ficheiros comuns\Microsoft Shared\Windows Live\WLLoginProxy.exe
C:\Programas\CCleaner\CCleaner.exe
C:\Programas\Trend Micro\HijackThis\HijackThis.exe
C:\WINDOWS\system32\wbem\wmiprvse.exe
R1 - HKCU\Software\Microsoft\Internet Explorer,SearchURL =
http://internetsearchservice.com
R1 - HKLM\Software\Microsoft\Internet Explorer,SearchURL =
http://internetsearchservice.com
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Search_URL =
http://internetsearchservice.com
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar =
http://internetsearchservice.com/ie6.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page =
http://internetsearchservice.com
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
http://www.sapo.pt/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL =
http://internetsearchservice.com
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar =
http://internetsearchservice.com/ie6.html
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page =
http://internetsearchservice.com
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
http://internetsearchservice.com
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
http://internetsearchservice.com
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyServer = localhost:8118
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName = Hiperligações
R3 - URLSearchHook: Barra de Ferramentas do Yahoo! com bloqueador de pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programas\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: Yahoo! Toolbar Helper - {02478D38-C3F9-4EFB-9B51-7695ECA05670} - C:\Programas\Yahoo!\Companion\Installs\cpn\yt.dll
O2 - BHO: AcroIEHlprObj Class - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Programas\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: Groove GFS Browser Helper - {72853161-30C5-4D22-B7F9-0BBC1D38A37E} - C:\PROGRA~1\MICROS~2\Office12\GRA8E1~1.DLL
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programas\Java\jre1.6.0_01\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Programa Auxiliar de Início de Sessão do Windows Live - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Programas\Ficheiros comuns\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: WarningBHO Class - {9989F1F6-70DE-4244-AC9F-6672983681A0} - C:\Programas\AntiSpyCheck 2.1\IEWarning32.dll (file missing)
O2 - BHO: (no name) - {A49E097A-D6EF-4B2F-8B0F-1230E998587F} - C:\Programas\Web Technologies\iebt.dll (file missing)
O2 - BHO: 238044 Class - {C0F371D7-926D-4700-B65E-63BFF1197205} - (no file)
O2 - BHO: (no name) - {F89F09DB-83D0-4B4D-A673-81865E7FBE87} - (no file)
O3 - Toolbar: vrmdtneg - {AE451F7D-4CA1-40D2-B6A1-D2AA62050344} - C:\WINDOWS\vrmdtneg.dll (file missing)
O3 - Toolbar: Barra de Ferramentas do Yahoo! com bloqueador de pop-up - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Programas\Yahoo!\Companion\Installs\cpn\yt.dll
O4 - HKLM\..\Run: [Gainward] C:\Programas\XpertVision\TBPanel.exe /A
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: [CTSysVol] C:\Programas\Creative\SBAudigy2\Surround Mixer\CTSysVol.exe
O4 - HKLM\..\Run: [CTDVDDet] C:\Programas\Creative\SBAudigy2\DVDAudio\CTDVDDet.EXE
O4 - HKLM\..\Run: [CTHelper] CTHELPER.EXE
O4 - HKLM\..\Run: [UpdReg] C:\WINDOWS\UpdReg.EXE
O4 - HKLM\..\Run: [NeroFilterCheck] C:\WINDOWS\system32\NeroCheck.exe
O4 - HKLM\..\Run: [DXDllRegExe] dxdllreg.exe
O4 - HKLM\..\Run: [DAEMON Tools] "C:\Programas\DAEMON Tools\daemon.exe" -lang 1033
O4 - HKLM\..\Run: [zBrowser Launcher] C:\Programas\Logitech\iTouch\iTouch.exe
O4 - HKLM\..\Run: [EM_EXEC] C:\PROGRA~1\Logitech\MOUSEW~1\SYSTEM\EM_EXEC.EXE
O4 - HKLM\..\Run: [RemoteControl] C:\Programas\CyberLink\PowerDVD\PDVDServ.exe
O4 - HKLM\..\Run: [LanguageShortcut] C:\Programas\CyberLink\PowerDVD\Language\Language.exe
O4 - HKLM\..\Run: [HP Component Manager] "C:\Programas\HP\hpcoretech\hpcmpmgr.exe"
O4 - HKLM\..\Run: [googletalk] C:\Programas\Google\Google Talk\googletalk.exe /autostart
O4 - HKLM\..\Run: [{0228e555-4f9c-4e35-a3ec-b109a192b4c2}] C:\Programas\Google\Gmail Notifier\gnotify.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Programas\Java\jre1.6.0_01\bin\jusched.exe"
O4 - HKLM\..\Run: [iTunesHelper] "C:\Programas\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [GrooveMonitor] "C:\Programas\Microsoft Office\Office12\GrooveMonitor.exe"
O4 - HKLM\..\Run: [DataLayer] C:\Programas\Ficheiros comuns\PCSuite\DataLayer\DataLayer.exe
O4 - HKLM\..\Run: [PCSuiteTrayApplication] C:\Programas\Nokia\Nokia PC Suite 6\LaunchApplication.exe -onlytray
O4 - HKLM\..\Run: [CloneCDTray] "C:\Programas\SlySoft\CloneCD\CloneCDTray.exe" /s
O4 - HKLM\..\Run: [QuickTime Task] "C:\Programas\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [AVP] "C:\Programas\Kaspersky Lab\Kaspersky Internet Security 7.0\avp.exe"
O4 - HKLM\..\Run: [C:\WINDOWS\system32\kdagd.exe] C:\WINDOWS\system32\kdagd.exe
O4 - HKCU\..\Run: [NBJ] "C:\Programas\Ahead\Nero BackItUp\NBJ.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [Nero PhotoShow Media Manager] C:\PROGRA~1\Nero\NEROPH~1\data\xtras\mssysmgr.exe
O4 - HKCU\..\Run: [SpybotSD TeaTimer] C:\Programas\Spybot - Search & Destroy\TeaTimer.exe
O4 - HKCU\..\Run: [firewals] C:\windows\system\ctfmon.exe
O4 - HKCU\..\Run: [Internet Explorerr] C:\windows\eguis.EXE
O4 - HKLM\..\Policies\Explorer\Run: [user32.dll] C:\Programas\Video ActiveX Access\iesmn.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVIÇO LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Serviço de rede')
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: Adobe Reader Speed Launch.lnk = C:\Programas\Adobe\Acrobat 7.0\Reader\reader_sl.exe
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Programas\HP\Digital Imaging\bin\hpqtra08.exe
O6 - HKCU\Software\Policies\Microsoft\Internet Explorer\Restrictions present
O8 - Extra context menu item: Adicionar ao Anti-Banner - C:\Programas\Kaspersky Lab\Kaspersky Internet Security 7.0\ie_banner_deny.htm
O8 - Extra context menu item: E&xportar para o Microsoft Excel - res://C:\PROGRA~1\MICROS~2\Office12\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programas\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programas\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra button: Estatísticas do Anti-vírus de Internet - {1F460357-8A94-4D71-9CA3-AA4ACF32ED8E} - C:\Programas\Kaspersky Lab\Kaspersky Internet Security 7.0\SCIEPlgn.dll
O9 - Extra button: Enviar para o OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: &Enviar para o OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~2\Office12\ONBttnIE.dll
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.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:\Programas\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Programas\Messenger\msmsgs.exe
O16 - DPF: {17492023-C23A-453E-A040-C7C580BBF700} (Windows Genuine Advantage Validation Tool) -
http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {20A60F0D-9AFA-4515-A0FD-83BD84642501} (Checkers Class) -
http://messenger.zone.msn.com/binary/msgrchkr.cab56986.cab
O16 - DPF: {30528230-99f7-4bb4-88d8-fa1d4f56a2ab} (YInstStarter Class) - C:\Programas\Yahoo!\Common\yinsthelper.dll
O16 - DPF: {4F1E5B1A-2A80-42CA-8532-2D05CB959537} (MSN Photo Upload Tool) -
http://gfx2.hotmail.com/mail/w2/resources/MSNPUpld.cab
O16 - DPF: {5CD4310E-88FB-43C1-BE24-5F3FA9C5C9D1} (KooPlayer Control) -
http://www.tvkoo.com/update/KooPlayer.ocx
O16 - DPF: {67A5F8DC-1A4B-4D66-9F24-A704AD929EEE} (System Requirements Lab) -
http://www.nvidia.com/content/DriverDownload/srl/2.0.0.1/sysreqlab2.cab
O16 - DPF: {67DABFBF-D0AB-41FA-9C46-CC0F21721616} (DivXBrowserPlugin Object) -
http://download.divx.com/player/DivXBrowserPlugin.cab
O16 - DPF: {AF2E62B6-F9E1-4D4F-A10A-9DC8E6DCBCC0} (VideoEgg ActiveX Loader) -
http://update.videoegg.com/Install/Windows/Initial/VideoEggPublisher.exe
O16 - DPF: {C1BAC744-8F0B-11D0-89E7-00C0A8295197} (Cameractl Class) -
http://www.crtvg.es/camweb/camera.cab
O16 - DPF: {C3F79A2B-B9B4-4A66-B012-3EE46475B072} (MessengerStatsClient Class) -
http://messenger.zone.msn.com/binary/MessengerStatsPAClient.cab56907.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{B2849FF7-0CDB-4AB5-A377-4D87F90BC869}: NameServer = 208.67.220.220,208.67.222.222
O17 - HKLM\System\CCS\Services\Tcpip\..\{F8FDA779-C63B-45FE-91AC-D382A262F9DE}: NameServer = 208.67.220.220,208.67.222.222
O17 - HKLM\System\CS2\Services\Tcpip\Parameters: NameServer = 208.67.220.220,208.67.222.222
O17 - HKLM\System\CS3\Services\Tcpip\Parameters: NameServer = 208.67.220.220,208.67.222.222
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: NameServer = 208.67.220.220,208.67.222.222
O18 - Protocol: grooveLocalGWS - {88FED34C-F0CA-4636-A375-3CB6248B04CD} - C:\PROGRA~1\MICROS~2\Office12\GR99D3~1.DLL
O20 - AppInit_DLLs: C:\PROGRA~1\KASPER~1\KASPER~2.0\adialhk.dll
O21 - SSODL: xvorfwbd - {27E17A67-74B3-479F-9A3F-E52685704C57} - C:\WINDOWS\xvorfwbd.dll (file missing)
O21 - SSODL: wpvmqosg - {A7074B99-BA02-4D97-A5D8-A17C72CFD2D3} - C:\WINDOWS\wpvmqosg.dll (file missing)
O22 - SharedTaskScheduler: eulogical - {99f8405b-63d1-421a-83bb-7b4b0642ac28} - (no file)
O23 - Service: Kaspersky Internet Security 7.0 (AVP) - Kaspersky Lab - C:\Programas\Kaspersky Lab\Kaspersky Internet Security 7.0\avp.exe
O23 - Service: ##Id_String1.6844F930_1628_4223_B5CC_5BB94B879762## (Bonjour Service) - Apple Computer, Inc. - C:\Programas\Bonjour\mDNSResponder.exe
O23 - Service: Creative Service for CDROM Access - Creative Technology Ltd - C:\WINDOWS\system32\CTsvcCDA.exe
O23 - Service: FLEXnet Licensing Service - Macrovision Europe Ltd. - C:\Programas\Ficheiros comuns\Macrovision Shared\FLEXnet Publisher\FNPLicensingService.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Programas\Ficheiros comuns\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: iPod Service - Apple Computer, Inc. - C:\Programas\iPod\bin\iPodService.exe
O23 - Service: iPodService - Apple Computer, Inc. - C:\Programas\iPod\bin\iPodService.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Programas\Ficheiros comuns\LightScribe\LSSrvc.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: PnkBstrA - Unknown owner - C:\WINDOWS\system32\PnkBstrA.exe
O23 - Service: Cyberlink RichVideo Service(CRVS) (RichVideo) - Unknown owner - C:\Programas\CyberLink\Shared Files\RichVideo.exe
O23 - Service: Remote Packet Capture Protocol v.0 (experimental) (rpcapd) - CACE Technologies - C:\Programas\WinPcap\rpcapd.exe
O24 - Desktop Component 0: Privacy Protection - file:///C:\WINDOWS\privacy_danger\index.htm
--
End of file - 14683 bytes
Se puderem ajudar agradeço....