thanks
already done : 2 tickets opened (1 with the old and closed support , 1 with new ticket support) and packages (your link beside) sent to avast (1 support package october 3th with 2015_2233 install and an other last week with 2016_2241 install).
nb:support give me a reg file about netframework driver
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aswStmXP\Parameters\Wdf]
"KmdfLibraryVersion"="1.9"
but they know it hasn’t resolved issue
I have an other winxp where all is right , so I think it’s just a personal issue (missing file ?) , more difficult for avast to understand , I know … :-[