Hi scorpian1988, You will need to perform a clean install of Windows 8 using an installation media, as the partition containing the factory image gets deleted when the whole disk is formatted. Please reply to this message with the system Service Tag (including the name on the account and contact details) via Private Message, so that I can check the warranty details and provide the options available.
I have a XPS 8500 with preinstalled windows 8. I tried to install Ubuntu 12.10 on it. When I partitioned the disk, I accidentally format the whole disk. Then I could not restart to Windows 8. I didn't make any backup or recovery media. How to restore factory image? Thank you very much.
XPS 8500 windows 8- how to restore factory image after accidentally formatting 
whole disk?