From the Server Administration panel, click on Server Re-image
Server Administration > Server Re-image
In the text box, enter the New initial password which will be used as the administrator user password for the new operating system install. Choose the operating system image to install and click Next.
List of operating systems
Read any additional information on the page, verify the password once again and when ready, click the Initialise button to begin the re-image.
Start with re-image
A confirmation page informs you that the re-image has begun. Re-images for Windows Servers may take between 1-3 hours. If you are waiting longer than 3 hours, please contact our Dedicated Server Support Team.
Click on Go To Overview to return to the Administration of the 1&1 Control Panel.
Re-image in progress
For additional information, you may want to reference: