All'avvio in CCleaner ho anche questi file:
MENU CONTESTUALE
Si Directory Aggiungi alla scaletta del lettore multimediale VLC VideoLAN "C:\Program Files (x86)\VideoLAN\VLC\vlc.exe" --started-from-file --playlist-enqueue "%1"
Si Directory DropboxExt Dropbox, Inc. C:\Program Files (x86)\Dropbox\Client\DropboxExt64.34.dll
Si Directory GDContextMenu Google C:\Program Files (x86)\Google\Drive\contextmenu64.dll
Si Directory Riproduci con il lettore multimediale VLC VideoLAN "C:\Program Files (x86)\VideoLAN\VLC\vlc.exe" --started-from-file --no-playlist-enqueue "%1"
Si Directory WinZip WinZip Computing, S.L. C:\Program Files\WinZip\wzshls64.dll
Si File 00avast AVAST Software C:\Program Files\AVAST Software\Avast\ashShA64.dll
Si File avast AVAST Software C:\Program Files\AVAST Software\Avast\ashShA64.dll
Si File DropboxExt Dropbox, Inc. C:\Program Files (x86)\Dropbox\Client\DropboxExt64.34.dll
Si File FileAssociationHelper Nico Mak Computing C:\Program Files\File Association Helper\FAHDll.dll
Si File GDContextMenu Google C:\Program Files (x86)\Google\Drive\contextmenu64.dll
Si File MBAMShlExt Malwarebytes C:\Program Files (x86)\Malwarebytes Anti-Malware\mbamext.dll
Si File NP8ShellExtension Nitro PDF C:\Program Files\Common Files\Nitro\Pro\8.0\NPShellExtension64.dll
Si File SugarSync
Si File WinRAR Alexander Roshal C:\Program Files (x86)\WinRAR\rarext64.dll
Si File WinRAR32 Alexander Roshal C:\Program Files (x86)\WinRAR\rarext.dll
Si File WinZip WinZip Computing, S.L. C:\Program Files\WinZip\wzshls64.dll
Si Folder avast AVAST Software C:\Program Files\AVAST Software\Avast\ashShA64.dll
Si Folder MBAMShlExt Malwarebytes C:\Program Files (x86)\Malwarebytes Anti-Malware\mbamext.dll
Si Folder SugarSync
Si Folder WinRAR Alexander Roshal C:\Program Files (x86)\WinRAR\rarext64.dll
Si Folder WinRAR32 Alexander Roshal C:\Program Files (x86)\WinRAR\rarext.dll
Si Folder WinZip WinZip Computing, S.L. C:\Program Files\WinZip\wzshls64.dll




PROCESSI PIANIFICATI
Si Task Adobe Acrobat Update Task Adobe Systems Incorporated C:\Program Files (x86)\Common Files\Adobe\ARM\1.0\AdobeARM.exe
Si Task Adobe Flash Player Updater Adobe Systems Incorporated C:\windows\SysWOW64\Macromed\Flash\FlashPlayerUpdateService.exe
Si Task AutoKMS C:\windows\AutoKMS.exe
Si Task AVGPCTuneUp_Task_BkGndMaintenance C:\Program Files (x86)\AVG\AVG PC TuneUp\tuscanx.exe $(Arg0)
Si Task CCleanerSkipUAC Piriform Ltd "C:\Program Files\CCleaner\CCleaner.exe" $(Arg0)
Si Task DivXUpdate DivX, LLC C:\Program Files (x86)\Common Files\DivX Shared\Qt4.8\DivXUpdate.exe
Si Task Dolby Selector Dolby Laboratories Inc. C:\Program Files (x86)\Dolby Home Theater v4\pcee4.exe -autostart
Si Task GoogleUpdateTaskMachineCore Google Inc. C:\Program Files (x86)\Google\Update\GoogleUpdate.exe /c
Si Task GoogleUpdateTaskMachineUA Google Inc. C:\Program Files (x86)\Google\Update\GoogleUpdate.exe /ua /installsource scheduler
No Task MATLAB R2012a Startup Accelerator c:\users\stefania\desktop\r2012a - copia\bin\win64\MATLABStartupAccelerator.exe
No Task Optimize Start Menu Cache Files-S-1-5-21-2566315678-400926263-566765053-1002
Si Task SafeZone scheduled Autoupdate 1449865247 Avast Software C:\Program Files\AVAST Software\SZBrowser\launcher.exe --scheduledautoupdate
Si Task SafeZone scheduled Autoupdate 1462692142 Avast Software C:\Program Files\AVAST Software\SZBrowser\launcher.exe --scheduledautoupdate $(Arg0)
Si Task WinZipBackGroundToolsTask WinZip Computing, S.L. C:\Program Files\WinZip\WzBGTools.exe
Si Task {92D5B699-F4A7-46E7-A285-FEADF8A52873} Microsoft Corporation C:\WINDOWS\system32\pcalua.exe -a "C:\Program Files (x86)\Picexa\uninstall.exe"
Si Task {C78DEA9C-821B-4F99-B536-76E28A63EE68} Microsoft Corporation C:\WINDOWS\system32\pcalua.exe -a "C:\Program Files (x86)\InstallShield Installation Information\{88547073-C566-4895-9005-EBE98EA3F7C7}\setup.exe" -c -runfromtemp -l0x0409
Si Task {E2A7053C-1A60-4666-A784-A80D8ECD3D28} Google Inc. "c:\program files (x86)\google\chrome\application\chrome.exe" http://ui.skype.com/ui/0/7.25.0.106/en/abandoninstall?source=lightinstaller&page=tsBing

Che faccio? Disattivo tutti?
grazieee

Per quanto riguarda Windows 10 ho salvato tutto su chiavetta, ma forse mi conviene aspettare ad aggiornarlo!

Ci sentiamo molto presto :)

Per disinstallare Avast devi usare il suo disinstallatore e in modalità provvisoria. Altrimenti ti rimangono residui che disturbano il PC.
http://www.ottimizzazione-pc.it/disinstallatori-antivirus-lista-completa/

Avast disinstallato completamente, ora il problema è attivare defender, quando vado per attivarlo mi apre la cartella di system32, e mi evidenzia una programma di nome MRT, devo cliccarci su?