The above files are being used by other programs, so is unable to backup them...
When I do a full backup using "AOMEI Backupper standard" there is a message: "The above files are being used by other programs, so is unable to backup them. Please click the following button to continue.
Mode Backup: (recommended) The rogram will restart computer and enter
the restart mode (windows pe mode) to complete this backup
retry: after close other programs to release the occupation of the files and click retry.
skip: if you do not want to backup the above files, click skip to ignore them.
cancel: cancel this backup operation."
I check using the program "Unlocker" - files is not busy.
The problem is what can be?