
You need to provide Windows credentials with administrator or at least backup operator rights to let Acronis True Image start a scheduled task
This article applies to:
Description
When you schedule a backup or validation task in Acronis True Image, you will need to provide your Windows user name and password at the Credentials screen of the Schedule Task Wizard:

(!) To find out your Windows user name please invoke Windows Task Manager (CTRL-ALT-DEL) and select the Processes tab and check the User Name in the corresponding column:

(!) If the machine is not password-protected, leave the password fields blank.
More information
The Windows user account you use to log in to your system should have administrator rights to run Acronis True Image tasks.
If you want to run the scheduled task under a user account with no administrator rights, you should make the account a member of the Backup Operators group:
- Log in under an account with administrator rights;
- Click Start -> Run and type lusrmgr.msc
- On the Local Users and Groups window click Users;
- Right-click the user you want to add to Backup Operators and choose Properties;
- On the User Properties window click Add;
- On the Select Groups window type in Backup Operators and click OK.
This will make the user account a member of Backup Operators and will allow you to do scheduled tasks under it.