Ciao ragazzi,
ho un disperato bisogno del vostro aiuto! E' da un po' di tempo che il mio pc va lento, specialmente durante l'avvio (le icone hanno un tempo di refresh assurdo) e ultimamente la cosa si è intensificata (quando sono su internet vengo reindirizzato in pagine ad e il touch pad ha smesso di funzionare come una volta). E' palese che ho qualche virus ma nessuno degli scanner e antivirus che ho provato riesce a liberarmene!
Vi posto il log di HijackThis, spero possiate darmi una mano.

Logfile of Trend Micro HijackThis v2.0.5
Scan saved at 20:48:04, on 03/02/2016
Platform: Windows 7 SP1 (WinNT 6.00.3505)
MSIE: Internet Explorer v11.0 (11.00.9600.18163)

FIREFOX: 44.0 (x86 it)
Boot mode: Normal

Running processes:
C:\Program Files (x86)\NVIDIA Corporation\Update Core\NvBackend.exe
C:\Users\ASUS\AppData\Local\Microsoft\OneDrive\OneDrive.exe
C:\Users\ASUS\AppData\Local\Dropbox\Update\DropboxUpdate.exe
C:\Windows\AsScrPro.exe
C:\Users\ASUS\AppData\Roaming\Dropbox\bin\Dropbox.exe
C:\Program Files (x86)\CyberLink\Power2Go\CLMLSvc.exe
C:\Program Files (x86)\Intel\Intel(R) USB 3.0 eXtensible Host Controller Driver\Application\iusb3mon.exe
C:\Program Files (x86)\ASUS\Wireless Console 3\wcourier.exe
C:\Program Files (x86)\ASUS\ATK Package\ATK Hotkey\HControlUser.exe
C:\Program Files (x86)\BlueStacks\HD-Agent.exe
C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe
C:\Program Files (x86)\Mozilla Firefox\firefox.exe
C:\Users\ASUS\Downloads\HijackThis.exe

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,SearchAssistant = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,CustomizeSearch = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = about:blank
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = about:blank
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) - {0EBBBE48-BAD4-4B4C-8E5A-516ABECAE064} - (no file)
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files (x86)\Java\jre1.8.0_71\bin\ssv.dll
O2 - BHO: avast! Online Security - {8E5E2654-AD2D-48bf-AC2D-D17F00898D06} - C:\Program Files\AVAST Software\Avast\aswWebRepIE.dll
O2 - BHO: Windows Live ID Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: (no name) - {B164E929-A1B6-4A06-B104-2CD0E90A88FF} - (no file)
O2 - BHO: URLRedirectionBHO - {B4F3A835-0E21-4959-BA22-42B3008E02FF} - C:\PROGRA~2\MICROS~1\Office14\URLREDIR.DLL
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files (x86)\Java\jre1.8.0_71\bin\jp2ssv.dll
O4 - HKLM\..\Run: [ASUSPRP] "C:\Program Files (x86)\ASUS\APRP\APRP.EXE"
O4 - HKLM\..\Run: [USB3MON] "C:\Program Files (x86)\Intel\Intel(R) USB 3.0 eXtensible Host Controller Driver\Application\iusb3mon.exe"
O4 - HKLM\..\Run: [Wireless Console 3] C:\Program Files (x86)\ASUS\Wireless Console 3\wcourier.exe
O4 - HKLM\..\Run: [ATKOSD2] C:\Program Files (x86)\ASUS\ATK Package\ATKOSD2\ATKOSD2.exe
O4 - HKLM\..\Run: [ATKMEDIA] C:\Program Files (x86)\ASUS\ATK Package\ATK Media\DMedia.exe
O4 - HKLM\..\Run: [HControlUser] C:\Program Files (x86)\ASUS\ATK Package\ATK Hotkey\HControlUser.exe
O4 - HKLM\..\Run: [BCSSync] "C:\Program Files (x86)\Microsoft Office\Office14\BCSSync.exe" /DelayServices
O4 - HKLM\..\Run: [BlueStacks Agent] C:\Program Files (x86)\BlueStacks\HD-Agent.exe
O4 - HKLM\..\Run: [AvastUI.exe] "C:\Program Files\AVAST Software\Avast\AvastUI.exe" /nogui
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe"
O4 - HKCU\..\Run: [Sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun
O4 - HKCU\..\Run: [DAEMON Tools Pro Agent] "C:\Program Files (x86)\DAEMON Tools Pro\DTAgent.exe" -autorun
O4 - HKCU\..\Run: [OneDrive] "C:\Users\ASUS\AppData\Local\Microsoft\OneDrive\OneDrive.exe" /background
O4 - HKCU\..\Run: [Dropbox Update] "C:\Users\ASUS\AppData\Local\Dropbox\Update\DropboxUpdate.exe" /c
O4 - Startup: Dropbox.lnk = ASUS\AppData\Roaming\Dropbox\bin\Dropbox.exe
O8 - Extra context menu item: E&sporta in Microsoft Excel - res://C:\PROGRA~2\MICROS~1\Office14\EXCEL.EXE/3000
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
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
O15 - Trusted Zone: http://*.webcompanion.com
O17 - HKLM\System\CCS\Services\Tcpip\..\{B3E2398D-1F0B-486F-945E-3D82401C5D1A}: NameServer = 192.168.1.1
O18 - Protocol: dssrequest - {5513F07E-936B-4E52-9B00-067394E91CC5} - (no file)
O18 - Protocol: sacore - {5513F07E-936B-4E52-9B00-067394E91CC5} - (no file)
O18 - Protocol: wlpg - {E43EF6CD-A37A-4A9B-9E6F-83F89B8E6324} - C:\Program Files (x86)\Windows Live\Photo Gallery\AlbumDownloadProtocolHandler.dll
O18 - Filter: application/x-mfe-ipt - {3EF5086B-5478-4598-A054-786C45D75692} - (no file)
O18 - Filter hijack: text/xml - {807573E5-5146-11D5-A672-00B0D022E945} - C:\Program Files (x86)\Common Files\Microsoft Shared\OFFICE14\MSOXMLMF.DLL
O20 - AppInit_DLLs: C:\Windows\SysWOW64\nvinit.dll
O23 - Service: Adobe Acrobat Update Service (AdobeARMservice) - Adobe Systems Incorporated - C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\armsvc.exe
O23 - Service: Adobe Flash Player Update Service (AdobeFlashPlayerUpdateSvc) - Adobe Systems Incorporated - C:\Windows\SysWOW64\Macromed\Flash\FlashPlayerUpdateService.exe
O23 - Service: AFBAgent - Unknown owner - C:\Windows\system32\FBAgent.exe (file missing)
O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\Windows\System32\alg.exe (file missing)
O23 - Service: Apache2.4 - Unknown owner - C:\xampp\apache\bin\httpd.exe (file missing)
O23 - Service: ASLDR Service (ASLDRService) - ASUS - C:\Program Files (x86)\ASUS\ATK Package\ATK Hotkey\ASLDRSrv.exe
O23 - Service: ATKGFNEX Service (ATKGFNEXSrv) - ASUS - C:\Program Files (x86)\ASUS\ATK Package\ATKGFNEX\GFNEXSrv.exe
O23 - Service: Avast Antivirus (avast! Antivirus) - AVAST Software - C:\Program Files\AVAST Software\Avast\AvastSvc.exe
O23 - Service: BlueStacks Android Service (BstHdAndroidSvc) - BlueStack Systems, Inc. - C:\Program Files (x86)\BlueStacks\HD-Service.exe
O23 - Service: BlueStacks Log Rotator Service (BstHdLogRotatorSvc) - BlueStack Systems, Inc. - C:\Program Files (x86)\BlueStacks\HD-LogRotatorService.exe
O23 - Service: BlueStacks Updater Service (BstHdUpdaterSvc) - BlueStack Systems, Inc. - C:\Program Files (x86)\BlueStacks\HD-UpdaterService.exe
O23 - Service: Intel(R) Content Protection HECI Service (cphs) - Intel Corporation - C:\Windows\SysWow64\IntelCpHeciSvc.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: NVIDIA GeForce Experience Service (GfExperienceService) - NVIDIA Corporation - C:\Program Files\NVIDIA Corporation\GeForce Experience Service\GfExperienceService.exe
O23 - Service: Intel(R) Integrated Clock Controller Service - Intel(R) ICCS (ICCS) - Intel Corporation - C:\Program Files (x86)\Intel\Intel(R) Integrated Clock Controller Service\ICCProxy.exe
O23 - Service: @%SystemRoot%\system32\ieetwcollectorres.dll,-1000 (IEEtwCollectorService) - Unknown owner - C:\Windows\system32\IEEtwCollector.exe (file missing)
O23 - Service: Intel(R) HD Graphics Control Panel Service (igfxCUIService1.0.0.0) - Unknown owner - C:\Windows\system32\igfxCUIService.exe (file missing)
O23 - Service: Intel(R) Capability Licensing Service Interface - Intel(R) Corporation - C:\Program Files\Intel\iCLS Client\HeciServer.exe
O23 - Service: Intel(R) Dynamic Application Loader Host Interface Service (jhi_service) - Intel Corporation - C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL\jhi_service.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: MBAMService - Malwarebytes - C:\Program Files (x86)\Malwarebytes Anti-Malware\mbamservice.exe
O23 - Service: Mozilla Maintenance Service (MozillaMaintenance) - Mozilla Foundation - C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
O23 - Service: @comres.dll,-2797 (MSDTC) - Unknown owner - C:\Windows\System32\msdtc.exe (file missing)
O23 - Service: mysql - Unknown owner - C:\xampp\mysql\bin\mysqld.exe (file missing)
O23 - Service: @%SystemRoot%\System32\netlogon.dll,-102 (Netlogon) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
O23 - Service: NVIDIA Network Service (NvNetworkService) - NVIDIA Corporation - C:\Program Files (x86)\NVIDIA Corporation\NetService\NvNetworkService.exe
O23 - Service: NVIDIA Streamer Network Service (NvStreamNetworkSvc) - NVIDIA Corporation - C:\Program Files\NVIDIA Corporation\NvStreamSrv\NvStreamNetworkService.exe
O23 - Service: NVIDIA Streamer Service (NvStreamSvc) - NVIDIA Corporation - C:\Program Files\NVIDIA Corporation\NvStreamSrv\NvStreamService.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - Unknown owner - C:\Windows\system32\nvvsvc.exe (file missing)
O23 - Service: Overwolf Updater Windows SCM (OverwolfUpdater) - Overwolf LTD - C:\Program Files (x86)\Overwolf\OverwolfUpdater.exe
O23 - Service: @%systemroot%\system32\psbase.dll,-300 (ProtectedStorage) - Unknown owner - C:\Windows\system32\lsass.exe (file missing)
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: @%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: @%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 - 12271 bytes

Il log è a posto, disattiva tutte le voci in Avvio tranne l'antivirus Avast, ne guadgnerai in avvio, questa operazione si fa più facilmente con ccleaner, apro il sw vai in Strumenti>Avvio e fai doppio clic so ogni voce da eliminare, vedrai la voce alla sinistra SI trasformarsi in NO, disattivata,
Poi fai le scansioni per pulire dalla spazzatura ed eventualmente da adware e malware.
Queste le indicazioni
.
Scarica ed installa MalwareBytes: clicca qui per il download: http://it.malwarebytes.org/
Clicca su: scarica la versione Gratuita alla destra, nella finestra che appare clic su Salva file,
poi per installarlo clic su: mbam-setup.exe, a completamento installazione togliere la spunta alla casella "Attiva la prova gratuita di Malwarebytes Pro" poi clic su fine.
Il programma è già in Italiano.
Nella parte alta cliccare sul menu Opzioni e nella sezione Rilevamento e protezione spuntare la casella Ricerca Rootkit
Prima di fare la scansione AGGIORNALO. (è molto importante)
Poi clic su SCANSIONE verrà fatta la ricerca di elementi nocivi., già selezionata di Default,.
Alla fine appariranno i risultati della ricerca, se ci sono elementi nocivi cliccare su Rimuovi selezionati che verranno messi in quarantena, poi clic su chiudi.
Durante le operazioni ignorare gli annunci che appaiono in basso, riguardano la vs Pro.
Posta il log.

Scarica Adwcleaner sul desktop:
http://dw2.it.uptodown.com/dw/1435411607/a94c018f502a4aea50c76175543cf32ee028bd97/adwcleaner-4-207-multi-win.exe
Per il download cliccare su: Download now
Chiudi tutti i browser (è importante IE,Firefox Chrome ecc...)
Clicca sul pulsante "Scan".
Finita la scansione clicca su "Clean"
Conferma con OK le varie finestre che ti compariranno.
Il pc si riavvierà, e uscirà il log con le eliminazioni.
Postalo qui.
ADW crea un backup dei files e delle impostazioni eliminati, si trova in "C:\AdwCleaner\Quarantine" in modo da consentire l'eventuale ripristino di dati erroneamente cancellati.
Per il ripristino, aprire il programma>Strumenti>Gestione quarantena>Ripristino.

Scarica Junkware Removal Tool sul desktop.
http://junkware-removal-tool.it.uptodown.com/download
Il download dovrebbe partire entro 5 secondi
Disattiva temporaneamente l'antivirus per evitare potenziali conflitti.
Doppio click su JRT
Lo strumento si aprirà e avvierà la scansione del sistema.
Devi avere pazienza in quanto questo tool può richiedere del tempo per completare la scansione .
Al termine, un log (JRT.txt) viene salvato sul desktop e si aprirà automaticamente.
Postalo qui.

Strumento rimozione Malware di Windows MRT
Vai su start>Esegui e digita MRT OK, nella finestra successiva scegli Analisi Completa, Avvia, se chiede di eliminare file acconsenti, alla fine viene rilasciato un log coi risultati.
MRT funziona su tutto i Sistemi Operativi windows.

Solo JRT ha cancellato alcune chiavi di registro, se hai disattivato le voci in avvio l'avvio dovrebbe essersi velocizzato.