I have two Dell Computers one with 512MB and one with 1 GB RAM. Both with Win XP PRO. Both run Zone Alarm Security Suite. Both have Acronis 9 Home latest build on them. Aside from Zone Alarm and Roxio CD Writing Software and the MS Office 2000 toolbar, neither have any other extraneous (other than XP) programs running. Both are scheduled to run an incremental backup when the computer is shut down once a day. And both are scheduled to run a full backup weekly on Friday morning. Both have a second internal hard drive for backing up to. First, they only run the incremental backup on random days. Some days it doesn't run. Then today, Thursday, one of them ran the full backup scheduled for Friday even though the computer's clock is correct and reports it to be Thursday, June 14. This is the first time that has happened. Are there any known interferences with the scheduled incremental backups when the computer is shut down? Does anyone have a suggestion for this? On my own machine at home I have no problem with this schedule and I have a lot more background programs running.