I still have one more question, yesterday I run scandisk by the command chkdsk /r, and there were two files damaged and were automatically replaced, then I scheduled boot-time scan, while the scan an error message occur : C:\Program Files\Fichiers communs\Microsoft Shared\OFFICE11\1036\DAO360\.....unable to sacn (archive is corrupted).
but the scan completed till the end.
when the windows started up, I scanned the path and recieved the same error. I selected it and clicked on "Action" then "Move". after that I no longer recieve the error.
I found the moved file in this path : C:\Program Files\Alwil Software\Avast4\DATA\moved. but frankly I don't understand that. can you please explain to me what I have done? and what's "move"?
by the way, I searched for the file DA0360 with the extention .chm(DA0360.CHM) but I couldn't find any thing about it to know what is the role of that file.