In order for a scheduled backup to run, you must provide your Windows password. Be sure the login you enter has Windows permission for the location you've selected for the backup.
Why does QuickBooks need my Windows password?
QuickBooks needs your Windows login information so it can run the scheduled backup. If you don't enter login information for the backup location you selected, the backup fails due to a Windows permission failure. Search Microsoft Help for "Passwords" to learn more about Windows passwords.
To do this task
If not already displayed, open the Store Windows Password window.
From the File menu, click Create Backup to open the backup wizard.
Select Local Backup.
If you haven't already done so, click Options to set your backup defaults (such as where you want to save your local backup) then click Next.
Click Only schedule future backups and then click Next.
Click New or select one of your previous backups and click Edit.
In the Schedule Backup window, click Store Password.
Enter your Windows login in the Username field if it doesn't already appear.
Enter your Windows password in the Password field.
What if I forgot my Windows password?
What if I change my Windows password?