Problem solved ! :emotion-2: I've uninstall Dell backup and recovery version 1.8.1.70 then reinstall version 1.8.1.71.There are no problems now,everything work great thus far.I'm happy ! 
Hello.....:emotion-2: I have a problem with Dell backup and backup(version1.8.1.70).Everything works great except for the "Merge System Backups".When I click on it, nothing happen.I like to know what can I do to get it working again ?  Thanks. My computer: Dell Inspiron, all in one model 3048   
Dell Backup And Recovery: " Merge System Backups" ?