ciao a tutti.

il problema deriva dal fatto che avast mi dice di aver trovato un malware, ed io non so se preoccuparmi...

ecco il log ottenuto da hijackthis:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 21.48.22, on 16/12/2009
Platform: Unknown Windows (WinNT 6.01.3504)
MSIE: Internet Explorer v8.00 (8.00.7600.16385)
Boot mode: Normal

Running processes:
C:\Windows\system32\Dwm.exe
C:\Windows\system32\taskhost.exe
C:\Windows\Explorer.EXE
C:\Windows\RtHDVCpl.exe
C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
C:\Program Files\Acer Arcade Deluxe\Acer Arcade Deluxe\ArcadeDeluxeAgent.exe
C:\Program Files\Acer Arcade Deluxe\Acer Arcade Deluxe\Kernel\CLML\CLMLSvc.exe
C:\Program Files\Intel\Intel Matrix Storage Manager\IAAnotif.exe
C:\Windows\PLFSetI.exe
C:\Program Files\Alwil Software\Avast4\ashDisp.exe
C:\Users\Marco\AppData\Local\Temp\RtkBtMnt.exe
C:\Program Files\Acer\Empowering Technology\ePower\ePower_DMC.exe
C:\Program Files\Java\jre6\bin\jusched.exe
C:\Program Files\Packard Bell\Packard Bell Software Suite\Launcher.exe
C:\Windows\ehome\ehmsas.exe
C:\Windows\system32\wbem\unsecapp.exe
C:\Windows\System32\spool\drivers\w32x86\3\E_FATIEJE.EXE
C:\Program Files\WIDCOMM\Bluetooth Software\BTTray.exe
C:\Program Files\Microsoft Office\Office12\WINWORD.EXE
C:\Program Files\Microsoft\Office Live\OfficeLiveSignIn.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Programmi\WinRAR\WinRAR.exe
C:\Users\Marco\AppData\Local\Temp\Rar$EX04.200\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://homepage.acer.com/rdr.aspx?b=ACAW&l=0410&s=0&o=vp32&d=0908&m=aspire_6935
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://homepage.acer.com/rdr.aspx?b=ACAW&l=0410&s=0&o=vp32&d=0908&m=aspire_6935
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://homepage.acer.com/rdr.aspx?b=ACAW&l=0410&s=0&o=vp32&d=0908&m=aspire_6935
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://homepage.acer.com/rdr.aspx?b=ACAW&l=0410&s=0&o=vp32&d=0908&m=aspire_6935
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
R3 - URLSearchHook: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn0\yt.dll
O1 - Hosts: ::1 localhost
O2 - BHO: &Yahoo! Toolbar Helper - {02478D38-C3F9-4efb-9B51-7695ECA05670} - C:\Program Files\Yahoo!\Companion\Installs\cpn0\yt.dll
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O2 - BHO: Search Helper - {6EBF7485-159F-4bff-A14F-B9E3AAC4465B} - C:\Program Files\Microsoft\Search Enhancement Pack\Search Helper\SEPsearchhelperie.dll
O2 - BHO: ShowBarObj Class - {83A2F9B1-01A2-4AA5-87D1-45B6B8505E96} - C:\Program Files\Acer\Empowering Technology\eDataSecurity\x86\ActiveToolBand.dll
O2 - BHO: Guida per l'accesso a Windows Live ID - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Easy Photo Print - {9421DD08-935F-4701-A9CA-22DF90AC4EA6} - C:\Program Files\Epson Software\Easy Photo Print\EPTBL.dll
O2 - BHO: Ask.com Toolbar BHO - {D4027C7F-154A-4066-A1AD-4243D8127440} - C:\Program Files\Ask.com\GenericAskToolbar.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
O2 - BHO: Windows Live Toolbar Helper - {E15A8DC0-8516-42A1-81EA-DC94EC1ACF10} - C:\Program Files\Windows Live\Toolbar\wltcore.dll
O2 - BHO: Kwyshell MidpX BHO - {EBE9E2B5-B526-48BC-AD46-687263EDCB0E} - C:\Program Files\Kwyshell\MidpX\JadInvoker\MidpInvoker.dll
O2 - BHO: SingleInstance Class - {FDAD4DA1-61A2-4FD8-9C17-86F7AC245081} - C:\Program Files\Yahoo!\Companion\Installs\cpn0\YTSingleInstance.dll
O3 - Toolbar: Barra degli Strumenti di IdiomaX - {477A7A3C-8B11-4B02-ADD1-7A01C4D00FA2} - C:\Program Files\Common Files\IdiomaX Shared\Cat 6.0\TrdIEAddIn.dll
O3 - Toolbar: Acer eDataSecurity Management - {5CBE3B7C-1E47-477e-A7DD-396DB0476E29} - C:\Program Files\Acer\Empowering Technology\eDataSecurity\x86\eDStoolbar.dll
O3 - Toolbar: Ask.com Toolbar - {D4027C7F-154A-4066-A1AD-4243D8127440} - C:\Program Files\Ask.com\GenericAskToolbar.dll
O3 - Toolbar: Kwyshell MidpX - {EBE9E2B5-B526-48BC-AD46-687263EDCB0E} - C:\Program Files\Kwyshell\MidpX\JadInvoker\MidpInvoker.dll
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn0\yt.dll
O3 - Toolbar: &Windows Live Toolbar - {21FA44EF-376D-4D53-9B0F-8A89D3229068} - C:\Program Files\Windows Live\Toolbar\wltcore.dll
O3 - Toolbar: Easy Photo Print - {9421DD08-935F-4701-A9CA-22DF90AC4EA6} - C:\Program Files\Epson Software\Easy Photo Print\EPTBL.dll
O4 - HKLM\..\Run: [RtHDVCpl] RtHDVCpl.exe
O4 - HKLM\..\Run: [Skytel] Skytel.exe
O4 - HKLM\..\Run: [SynTPEnh] C:\Program Files\Synaptics\SynTP\SynTPEnh.exe
O4 - HKLM\..\Run: [Adobe ARM] "C:\Program Files\Common Files\Adobe\ARM\1.0\AdobeARM.exe"
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [ArcadeDeluxeAgent] "C:\Program Files\Acer Arcade Deluxe\Acer Arcade Deluxe\ArcadeDeluxeAgent.exe"
O4 - HKLM\..\Run: [CLMLServer] "C:\Program Files\Acer Arcade Deluxe\Acer Arcade Deluxe\Kernel\CLML\CLMLSvc.exe"
O4 - HKLM\..\Run: [IAAnotif] C:\Program Files\Intel\Intel Matrix Storage Manager\iaanotif.exe
O4 - HKLM\..\Run: [PLFSetI] C:\Windows\PLFSetI.exe
O4 - HKLM\..\Run: [WarReg_PopUp] C:\Program Files\Acer\WR_PopUp\WarReg_PopUp.exe
O4 - HKLM\..\Run: [WinsysMon] C:\Users\Marco\AppData\Roaming\googledownload.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\Windows\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [LManager] C:\Program Files\Launch Manager\LManager.exe
O4 - HKLM\..\Run: [ePower_DMC] C:\Program Files\Acer\Empowering Technology\ePower\ePower_DMC.exe
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
O4 - HKCU\..\Run: [ehTray.exe] C:\Windows\ehome\ehTray.exe
O4 - HKCU\..\Run: [ManyCam] "C:\Program Files\Multimedia\ManyCam 2.4\ManyCam.exe"
O4 - HKCU\..\Run: [Packard Bell Software Suite] C:\Program Files\Packard Bell\Packard Bell Software Suite\Launcher.exe /run
O4 - HKCU\..\Run: [msnmsgr] "C:\Program Files\Windows Live\Messenger\msnmsgr.exe" /background
O4 - HKCU\..\Run: [EPSON BX300F Series] C:\Windows\system32\spool\DRIVERS\W32X86\3\E_FATIEJE.EXE /FU "C:\Windows\TEMP\E_SC57F.tmp" /EF "HKCU"
O4 - Global Startup: Bluetooth.lnk = ?
O4 - Global Startup: BumpTop.lnk = C:\Program Files\BumpTop\BumpTop.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~1\MICROS~4\Office12\EXCEL.EXE/3000
O8 - Extra context menu item: Link to &MidpX - C:\Program Files\Kwyshell\MidpX\JadInvoker\Extent\jad_wrap.htm
O9 - Extra button: Inserisci blog - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra 'Tools' menuitem: Inserisci &blog in Windows Live Writer - {219C3416-8CB2-491a-A3C7-D9FCDDC9D600} - C:\Program Files\Windows Live\Writer\WriterBrowserExtension.dll
O9 - Extra button: Invia a OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~4\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: I&nvia a OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~4\Office12\ONBttnIE.dll
O9 - Extra button: PalTalk - {4EAFEF58-EEFA-4116-983D-03B49BCBFFFE} - C:\Program Files\Paltalk Messenger\Paltalk.exe
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~4\Office12\REFIEBAR.DLL
O9 - Extra button: PokerStars.it - {C4046502-6524-4d87-896C-878F57D1FF07} - C:\Program Files\PokerStars.IT\PokerStarsUpdate.exe
O9 - Extra button: Mostra/Nascondi Barra di Traduzione - {FE768A8F-9F88-4511-B28B-552ED2F6B500} - C:\Program Files\Common Files\IdiomaX Shared\Cat 6.0\TrdIEAddIn.dll
O13 - Gopher Prefix:
O16 - DPF: {60E33102-59F1-44DA-BA3D-494BB9A80514} (Iphona) - http://www.inps.it/Servizi/ParlaConNoi/VoipFiles/IPhona.cab
O17 - HKLM\System\CCS\Services\Tcpip\..\{28DBB6BB-DC31-471F-BF9B-BFA84D3D7F9E}: NameServer = 85.37.17.57 85.38.28.80
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O20 - Winlogon Notify: AWinNotifyVitaKey MC3000 - C:\Windows\
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: Bluetooth Service (btwdins) - Broadcom Corporation. - C:\Program Files\WIDCOMM\Bluetooth Software\btwdins.exe
O23 - Service: NTI Backup Now 5 Agent Service (BUNAgentSvc) - NewTech Infosystems, Inc. - C:\Program Files\NewTech Infosystems\NTI Backup Now 5\Client\Agentsvc.exe
O23 - Service: CLHNService - Unknown owner - C:\Program Files\Acer Arcade Deluxe\HomeMedia\Kernel\DMP\CLHNService.exe
O23 - Service: DTBService - Unknown owner - C:\Programmi\Multimedia\DVRMSToolbox\DTBFWService.exe
O23 - Service: eDataSecurity Service - Egis Incorporated - C:\Program Files\Acer\Empowering Technology\eDataSecurity\x86\eDSService.exe
O23 - Service: Emma Device Management (EmmaDevMgmtSvc) - Sony Ericsson Mobile Communications - C:\Program Files\Common Files\Sony Ericsson\Emma Core\Services\EmmaDeviceMgmt.exe
O23 - Service: Emma Update Management (EmmaUpdMgmtSvc) - Sony Ericsson Mobile Communications - C:\Program Files\Common Files\Sony Ericsson\Emma Core\Services\EmmaUpdateMgmt.exe
O23 - Service: Empowering Technology Service (ETService) - Unknown owner - C:\Program Files\Acer\Empowering Technology\Service\ETService.exe
O23 - Service: Google Desktop Manager 5.7.808.7150 (GoogleDesktopManager-080708-050100) - Google - C:\Program Files\Google\Google Desktop Search\GoogleDesktop.exe
O23 - Service: Intel(R) Matrix Storage Event Monitor (IAANTMON) - Intel Corporation - C:\Program Files\Intel\Intel Matrix Storage Manager\IAANTMon.exe
O23 - Service: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files\Common Files\LightScribe\LSSrvc.exe
O23 - Service: MobilityService - Acer Incorporated - C:\Acer\Mobility Center\MobilityService.exe
O23 - Service: NTI Backup Now 5 Backup Service (NTIBackupSvc) - NewTech InfoSystems, Inc. - C:\Program Files\NewTech Infosystems\NTI Backup Now 5\BackupSvc.exe
O23 - Service: NTI Backup Now 5 Scheduler Service (NTISchedulerSvc) - Unknown owner - C:\Program Files\NewTech Infosystems\NTI Backup Now 5\SchedulerSvc.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - C:\Windows\system32\nvvsvc.exe
O23 - Service: Sony Ericsson OMSI download service (OMSI download service) - Unknown owner - C:\Program Files\Sony Ericsson\Sony Ericsson PC Suite\SupServ.exe
O23 - Service: Cyberlink RichVideo Service(CRVS) (RichVideo) - Unknown owner - C:\Program Files\Cyberlink\Shared files\RichVideo.exe
O23 - Service: Raw Socket Service (RS_Service) - Acer Incorporated - C:\Program Files\Acer\Acer VCM\RS_Service.exe
O23 - Service: Packard Bell Software Suite Service 1 (Service1) - Packard Bell Services - C:\Program Files\Packard Bell\Packard Bell Software Suite\PowerSave\HDPBSSS.exe
O23 - Service: TeamViewer 4 (TeamViewer4) - TeamViewer GmbH - C:\Program Files\TeamViewer\Version4\TeamViewer_Service.exe
O23 - Service: Validity Fingerprint Service (vfsFPService) - Validity Sensors, Inc. - C:\Windows\system32\vfsFPService.exe
O23 - Service: Yahoo! Updater (YahooAUService) - Yahoo! Inc. - C:\Program Files\Yahoo!\SoftwareUpdate\YahooAUService.exe

--
End of file - 12518 bytes


premetto che sono al mio primo log e spero di averlo fatto bene (per esempio non l'ho eseguito da amministratore: va bene lo stesso?

come s.o. ho windows 7.

se servono altre informazioni chiedete pure...

un grazie a chi vorrà aiutarmi.

marco.

Ciao.
Purtroppo, non conosco molto Windows7.
Ma questa cartella in rosso la puoi eliminare:
C:\Program Files\Ask.com\GenericAskToolbar.dll
In ogni caso, prova una scansione con Malwarebytes:
Scarica ed installa MalwareBytes:
clicca qui per il download : http://www.aiutamici.com/software?id=80346
Prima di fare la scansione AGGIORNALO. (è molto importante)
Esegui una scansione completa del sistema.
Posta il log.

Veramente, avevo indicato di fare una scansione completa NON rapida.
Hai eliminato la cartella Ask.com?
Avvia hijackthis, metti la spunta alle voci che andrò ad elencarti e con tutte le applicazioni chiuse e disconnesso da Internet,premi su fix checked

O2 - BHO: Ask.com Toolbar BHO - {D4027C7F-154A-4066-A1AD-4243D8127440} - C:\Program Files\Ask.com\GenericAskToolbar.dll
O3 - Toolbar: Ask.com Toolbar - {D4027C7F-154A-4066-A1AD-4243D8127440} - C:\Program Files\Ask.com\GenericAskToolbar.dll
O16 - DPF: {60E33102-59F1-44DA-BA3D-494BB9A80514} (Iphona) - http://www.inps.it/Servizi/ParlaConNoi/VoipFiles/IPhona.cab

Dai una pulita (registro compreso)con CCleaner: http://www.aiutamici.com/software?ID=11223
Nella schermata iniziale di CCleaner, clicca su Opzioni e poi Avanzate, togli il segno di spunta a: Cancella i file in Windows Temp solo se più vecchi di 48 ore. (poi esegui le pulizie)
Se non riscontri problemi, mi fermerei qui.

il programma ASK dovresti trovarlo anche nell'elenco delle applicazioni del pannello di controllo, di solito viene installato insieme a Utorrent e puoi rimuoverlo da li come un qualsiasi programma.
una volta fatti girare CCleaner e malwarebyte prova ad installare anche Normann Malware Clener per essere sicuro di aver pulito davvero ogni traccia di malware sul pc.
alla fine non ti resterà che rimuovere gli eventuali spyware rimasti che nessuno dei programmi elencati è in grado di trovare.
io personalmente per una pulizia accurata utilizzo Spyware Doctor ma ha bisogno di regolare licenza per essere utilizzato.
in alternativa prova con AVG che ha un motore antispyware al suo interno o spybot search and destroy .....in bocca al lupo!