Hey there, let's work through this problem together—since you only have access to your Acronis backup console right now, here's what you need to know:

First off, yes, it is possible to get your Administrator account back by restoring a specific system folder. Windows stores all user account information (including passwords and account status) in the C:\Windows\System32\config directory. This folder contains the SAM (Security Accounts Manager) database, which is the core repository for all local user accounts on your server.

Here's the step-by-step approach you should take:

• Confirm your backup version: Make sure you're using a backup that was created before you disabled the Administrator account and made the new one. If you use a backup from after those changes, it won't help—you'll just end up with the same locked-out state.
• Use Acronis' bootable recovery media: Since you can't access the running server, you'll need to create an Acronis bootable USB or ISO (most backup tools include this feature). Boot your server from this media to launch the Acronis recovery environment.
• Restore the config folder: In the recovery environment, locate your backup and restore the entire C:\Windows\System32\config directory. This will roll back the SAM database and related system security files to the state they were in when the backup was taken.
• Restart and test: Once the restore completes, reboot your server. You should now be able to log in using the Administrator account's password from the backup period.

A few important notes to keep in mind:

• Restoring this folder will revert all local user accounts to their state at backup time—so the new account you created will likely be removed. You can recreate it later once you're logged back in.
• Don't try to restore individual files from the config folder (like just the SAM file) unless you're very familiar with Windows system internals. Restoring the entire folder is safer and ensures all related files are in sync.

备注：内容来源于stack exchange，提问作者Coskun Ozogul