Chiedo una mano a chi ne sa più di me, mi controllate il log qui di seguito di HJT? Oggi tentando di aggiornare il software di controllo dell'UPS chissà cosa ho scaricato, risultato nessun malaware (secondo MAB) ma tantissima spazzatura (programmi autoinstallati, spam...).
Ora secondo MAB, ADW, Spybot, JRT sono pulito... però un controllino su HJT è gradito:

Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 16:02:05, on 08/10/2015
Platform: Windows 7 SP1 (WinNT 6.00.3505)
MSIE: Internet Explorer v11.0 (11.00.9600.18015)
Boot mode: Normal

Running processes:
C:\Program Files (x86)\NVIDIA Corporation\Update Core\NvBackend.exe
C:\Program Files (x86)\MyDrive Connect\TomTom MyDrive Connect.exe
C:\Program Files (x86)\Wireless Keyboard Driver\LedStatusApp.exe
C:\Program Files (x86)\Renesas Electronics\USB 3.0 Host Controller Driver\Application\nusb3mon.exe
C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe
C:\Program Files (x86)\Mozilla Firefox\firefox.exe
C:\Program Files (x86)\Trend Micro\HiJackThis\HiJackThis.exe
C:\Windows\SysWOW64\DllHost.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkID=617911&ResetID=130887690299422772&GUID=92B1775D-5C95-41F5-98AE-8BA258271316
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 =
O2 - BHO: Canon Easy-WebPrint EX BHO - {3785D0AD-BFFF-47F6-BF5B-A587C162FED9} - C:\Program Files (x86)\Canon\Easy-WebPrint EX\ewpexbho.dll
O2 - BHO: PXCIEaddin - {42DFA04F-0F16-418e-B80C-AB97A5AFAD39} - C:\Program Files (x86)\Tracker Software\PDF-XChange 4\PXCIEAddin4.dll
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files (x86)\Java\jre1.8.0_60\bin\ssv.dll
O2 - BHO: IESpeakDoc - {8D10F6C4-0E01-4BD4-8601-11AC1FDF8126} - C:\Program Files (x86)\Bluetooth Suite\IEPlugIn.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files (x86)\Java\jre1.8.0_60\bin\jp2ssv.dll
O3 - Toolbar: Canon Easy-WebPrint EX - {759D9886-0C6F-4498-BAB6-4A5F47C6C72F} - C:\Program Files (x86)\Canon\Easy-WebPrint EX\ewpexhlp.dll
O4 - HKLM\..\Run: [WIRELESS-KB-LED-STATUS] C:\Program Files (x86)\Wireless Keyboard Driver\LedStatusApp.exe
O4 - HKLM\..\Run: [NUSB3MON] "C:\Program Files (x86)\Renesas Electronics\USB 3.0 Host Controller Driver\Application\nusb3mon.exe"
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files (x86)\Common Files\Java\Java Update\jusched.exe"
O4 - HKCU\..\Run: [MyDriveConnect.exe] "C:\Program Files (x86)\MyDrive Connect\TomTom MyDrive Connect.exe"
O4 - HKCU\..\Run: [SpybotPostWindows10UpgradeReInstall] "C:\Program Files\Common Files\AV\Spybot - Search and Destroy\Test.exe"
O4 - HKCU\..\Run: [Spybot-S&D Cleaning] "C:\Program Files (x86)\Spybot - Search & Destroy 2\SDCleaner.exe" /autoclean
O4 - HKCU\..\Run: [CCleaner Monitoring] "C:\Program Files\CCleaner\CCleaner64.exe" /MONITOR
O9 - Extra button: (no name) - {7815BE26-237D-41A8-A98F-F7BD75F71086} - C:\Program Files (x86)\Bluetooth Suite\IEPlugIn.dll
O9 - Extra 'Tools' menuitem: Send by Bluetooth to - {7815BE26-237D-41A8-A98F-F7BD75F71086} - C:\Program Files (x86)\Bluetooth Suite\IEPlugIn.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~2\MICROS~2\Office12\REFIEBAR.DLL
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~2\COMMON~1\Skype\SKYPE4~1.DLL
O20 - Winlogon Notify: SDWinLogon - SDWinLogon.dll (file missing)
O23 - Service: Adobe Flash Player Update Service (AdobeFlashPlayerUpdateSvc) - Adobe Systems Incorporated - C:\Windows\SysWOW64\Macromed\Flash\FlashPlayerUpdateService.exe
O23 - Service: @%SystemRoot%\system32\Alg.exe,-112 (ALG) - Unknown owner - C:\Windows\System32\alg.exe (file missing)
O23 - Service: AtherosSvc - Atheros Commnucations - C:\Program Files (x86)\Bluetooth Suite\adminservice.exe
O23 - Service: CLHNServiceForPowerDVD - Unknown owner - C:\Program Files (x86)\CyberLink\PowerDVD11\Kernel\DMP\CLHNServiceForPowerDVD.exe
O23 - Service: CyberLink PowerDVD 11.0 Monitor Service - CyberLink - C:\Program Files (x86)\CyberLink\PowerDVD11\Common\MediaServer\CLMSMonitorService.exe
O23 - Service: CyberLink PowerDVD 11.0 Service - CyberLink - C:\Program Files (x86)\CyberLink\PowerDVD11\Common\MediaServer\CLMSServerForPDVD11.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: Foxit Cloud Safe Update Service (FoxitCloudUpdateService) - Foxit Software Inc. - C:\Program Files (x86)\Foxit Software\Foxit Reader\Foxit Cloud\FCUpdateService.exe
O23 - Service: NVIDIA GeForce Experience Service (GfExperienceService) - NVIDIA Corporation - C:\Program Files\NVIDIA Corporation\GeForce Experience Service\GfExperienceService.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: LightScribeService Direct Disc Labeling Service (LightScribeService) - Hewlett-Packard Company - C:\Program Files (x86)\Common Files\LightScribe\LSSrvc.exe
O23 - Service: MBAMService - Malwarebytes Corporation - 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: @%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 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: @%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: Spybot-S&D 2 Scanner Service (SDScannerService) - Safer-Networking Ltd. - C:\Program Files (x86)\Spybot - Search & Destroy 2\SDFSSvc.exe
O23 - Service: Spybot-S&D 2 Updating Service (SDUpdateService) - Safer-Networking Ltd. - C:\Program Files (x86)\Spybot - Search & Destroy 2\SDUpdSvc.exe
O23 - Service: Spybot-S&D 2 Security Center Service (SDWSCService) - Safer-Networking Ltd. - C:\Program Files (x86)\Spybot - Search & Destroy 2\SDWSCSvc.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: SureThing Labelflash service - MicroVision Development, Inc. - C:\Program Files (x86)\Common Files\SureThing Shared\stllssvr.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: @%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)

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End of file - 9575 bytes

Il log è pulito, le scansioni le hai già fatte direi che sei a posto, dai una pulita al Registro e pulisci anche la cartella Prefetch.

Pulire la cartella Prefetch:
Vai in C:\windows\cerca la cartella Prefetch, aprila e cancella tutti i file compresa la cartella ReadyBoot che verrà ricreata, non va cancellato il file layout.ini.

ciao :O)

Il sistema operativo esegue un'operazione di "prefetch" che consiste nel rendere immediatamente disponibili i file necessari per il processo di avvio del computer e quelli utilizzati più spesso nella memoria cache.
quindi se si pulisce questa cartella si possono eliminare .... anche .......file nocivi al sistema

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Ti ha risposto perfettamente l'amico maopapof.