pregherei qualche esperto di log, se può controllare questo , riguardo ad un nuovo notebook, forse dovrei togliere qualche programma inutile o bloccarne qualche altro, grazie anticipate:


Logfile of Trend Micro HijackThis v2.0.5
Scan saved at 15:28:17, on 09/12/2015
Platform: Unknown Windows (WinNT 6.02.1008)
MSIE: Internet Explorer v11.0 (11.00.9600.17840)


Boot mode: Normal

Running processes:
C:\Users\Gjack\AppData\Local\SweetLabs App Platform\Engine\ServiceHostApp.exe
C:\Program Files (x86)\Skype\Phone\Skype.exe
C:\Program Files (x86)\Lenovo\Power2Go\CLMLSvc_P2G8.exe
C:\Program Files (x86)\Lenovo\PowerDVD10\PDVD10Serv.EXE
C:\Program Files (x86)\IObit\IObit Uninstaller\UninstallMonitor.exe
C:\Users\Gjack\AppData\Local\SweetLabs App Platform\Engine\ServiceHostApp.exe
C:\Users\Gjack\Downloads\HijackThis\HijackThis.exe
C:\windows\SysWOW64\NOTEPAD.EXE
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
C:\Program Files (x86)\Internet Explorer\IEXPLORE.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://www.google.it/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/p/?LinkId=255141
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/p/?LinkId=255141
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 =
F2 - REG:system.ini: UserInit=userinit.exe,
O4 - HKLM\..\Run: [StartCCC] "C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static\amd64\CLIStart.exe" MSRun
O4 - HKLM\..\Run: [CLMLServer_For_P2G8] "C:\Program Files (x86)\Lenovo\Power2Go\CLMLSvc_P2G8.exe"
O4 - HKLM\..\Run: [CLVirtualDrive] "C:\Program Files (x86)\Lenovo\Power2Go\VirtualDrive.exe" /R
O4 - HKCU\..\Run: [Skype] "C:\Program Files (x86)\Skype\Phone\Skype.exe" /minimized /regrun
O4 - HKCU\..\Run: [CCleaner Monitoring] "C:\Program Files\CCleaner\CCleaner64.exe" /MONITOR
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O18 - Filter: application/x-mfe-ipt - {3EF5086B-5478-4598-A054-786C45D75692} - c:\PROGRA~2\mcafee\msc\mcsniepl.dll
O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\windows\System32\alg.exe (file missing)
O23 - Service: AMD External Events Utility - Unknown owner - C:\windows\system32\atiesrxx.exe (file missing)
O23 - Service: AMD FUEL Service - Advanced Micro Devices, Inc. - C:\Program Files\ATI Technologies\ATI.ACE\Fuel\Fuel.Service.exe
O23 - Service: ACP User Service (amdacpusrsvc) - Unknown owner - C:\AMD\amdacpusrsvc.exe
O23 - Service: BTDevManager - Unknown owner - C:\Program Files (x86)\REALTEK\Realtek Bluetooth\BTDevMgr.exe
O23 - Service: CCSDK - Unknown owner - C:\Program Files (x86)\Lenovo\CCSDK\CCSDK.exe
O23 - Service: @C:\windows\system32\CxAudMsg64.exe,-100 (CxAudMsg) - Unknown owner - C:\windows\system32\CxAudMsg64.exe (file missing)
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: McAfee Home Network (HomeNetSvc) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\Platform\McSvcHost\McSvHost.exe
O23 - Service: @%SystemRoot%\system32\ieetwcollectorres.dll,-1000 (IEEtwCollectorService) - Unknown owner - C:\windows\system32\IEEtwCollector.exe (file missing)
O23 - Service: @keyiso.dll,-100 (KeyIso) - Unknown owner - C:\windows\system32\lsass.exe (file missing)
O23 - Service: Lenovo EasyPlus Hotspot - Lenovo - C:\Program Files (x86)\Common Files\lenovo\easyplussdk\bin\EPHotspot64.exe
O23 - Service: Lenovo System Agent Service - LENOVO INCORPORATED. - C:\Program Files\Lenovo\iMController\SystemAgentService.exe
O23 - Service: Lenovo WiFiHotspot Service (LenovoWiFiHotspotSvr) - Unknown owner - C:\Windows\System32\LenovoWiFiHotspotSvr.exe (file missing)
O23 - Service: LiveUpdate (LiveUpdateSvc) - IObit - C:\Program Files (x86)\IObit\LiveUpdate\LiveUpdate.exe
O23 - Service: LUService - Lenovo(beijing) Limited - C:\Program Files (x86)\Lenovo\Lenovo Updates\LUService.exe
O23 - Service: MBAMService - Malwarebytes - C:\Program Files (x86)\Malwarebytes Anti-Malware\mbamservice.exe
O23 - Service: McAfee AP Service (McAPExe) - McAfee, Inc. - C:\Program Files\McAfee\MSC\McAPExe.exe
O23 - Service: McAfee Activation Service (McAWFwk) - McAfee, Inc. - c:\PROGRA~1\COMMON~1\mcafee\actwiz\mcawfwk.exe
O23 - Service: McAfee Boot Delay Start Service (mcbootdelaystartsvc) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\platform\McSvcHost\McSvHost.exe
O23 - Service: McAfee CSP Service (mccspsvc) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\CSP\1.6.1180.0\McCSPServiceHost.exe
O23 - Service: McAfee Personal Firewall Service (McMPFSvc) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\Platform\McSvcHost\McSvHost.exe
O23 - Service: McAfee VirusScan Announcer (McNaiAnn) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\platform\McSvcHost\McSvHost.exe
O23 - Service: McAfee Scanner (McODS) - McAfee, Inc. - C:\Program Files\mcafee\VirusScan\mcods.exe
O23 - Service: McAfee Platform Services (mcpltsvc) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\platform\McSvcHost\McSvHost.exe
O23 - Service: McAfee Proxy Service (McProxy) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\platform\McSvcHost\McSvHost.exe
O23 - Service: McAfee Firewall Core Service (mfefire) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\SystemCore\\mfefire.exe
O23 - Service: McAfee Service Controller (mfemms) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\SystemCore\\mfemms.exe
O23 - Service: McAfee Validation Trust Protection Service (mfevtp) - Unknown owner - C:\windows\system32\mfevtps.exe (file missing)
O23 - Service: @comres.dll,-2797 (MSDTC) - Unknown owner - C:\windows\System32\msdtc.exe (file missing)
O23 - Service: McAfee Anti-Spam Service (MSK80Service) - McAfee, Inc. - C:\Program Files\Common Files\McAfee\Platform\McSvcHost\McSvHost.exe
O23 - Service: @%SystemRoot%\System32\netlogon.dll,-102 (Netlogon) - Unknown owner - C:\windows\system32\lsass.exe (file missing)
O23 - Service: NitroPDFDriverCreatorReadSpool9 (NitroDriverReadSpool9) - Nitro PDF Software - C:\Program Files\Common Files\Nitro\Pro\9.0\NitroPDFDriverService9x64.exe
O23 - Service: Nalpeiron Licensing Service (nlsX86cc) - Nalpeiron Ltd. - C:\windows\SysWOW64\NLSSRV32.EXE
O23 - Service: Cyberlink RichVideo64 Service(CRVS) (RichVideo64) - Unknown owner - C:\Program Files\CyberLink\Shared files\RichVideo64.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: Conexant SmartAudio service (SAService) - Conexant Systems, Inc. - C:\windows\system32\SAsrv.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: SynTPEnh Caller Service (SynTPEnhService) - Synaptics Incorporated - C:\Program Files\Synaptics\SynTP\SynTPEnhService.exe
O23 - Service: @%SystemRoot%\system32\ui0detect.exe,-101 (UI0Detect) - Unknown owner - C:\windows\system32\UI0Detect.exe (file missing)
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: VeriFaceSrv - Unknown owner - C:\Program Files (x86)\Lenovo\Lenovo VeriFace Pro\VfConnectorService.exe
O23 - Service: @%systemroot%\system32\vssvc.exe,-102 (VSS) - Unknown owner - C:\windows\system32\vssvc.exe (file missing)
O23 - Service: @%systemroot%\system32\wbengine.exe,-104 (wbengine) - Unknown owner - C:\windows\system32\wbengine.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Defender\MpAsDesc.dll,-320 (WdNisSvc) - Unknown owner - C:\Program Files (x86)\Windows Defender\NisSrv.exe (file missing)
O23 - Service: @%ProgramFiles%\Windows Defender\MpAsDesc.dll,-310 (WinDefend) - Unknown owner - C:\Program Files (x86)\Windows Defender\MsMpEng.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 - 9486 bytes

Il log è a posto, i programmi che si potrebbero eliminare sono tutti quelli della Lenovo, tutte utility che mettono le case produttrici che di utile non hanno niente.
Queste 2 voci disattivale dall'avvio automatico, non servono;
O4 - HKLM\..\Run: [CLMLServer_For_P2G8] "C:\Program Files (x86)\Lenovo\Power2Go\CLMLSvc_P2G8.exe"
O4 - HKLM\..\Run: [CLVirtualDrive] "C:\Program Files (x86)\Lenovo\Power2Go\VirtualDrive.exe" /R
Ciao

Per rimuovere i programmi non occorre andare in provvisoria, vai in C:\ programmi e li rimuovi.
Con win 8.1 è già inserito nel sistema Defender che fa da antivirus, elimina McAfee e attiva Defender, pannello di controllo>Windows Defender e lo attivi, poi lo aggiorni. Molto semplice.

Tutto OK il pc mi sembra messo molto bene.