overclockers pre built question - operating system

[ThriceNightly]

http://www.overclockers.co.uk/showproduct.php?prodid=FS-180-OK&tool=3

with the pre-built systems if i choose the operating system at the same time is it pre-installed or do i have to install it?

i.e. is the installation of the operating system included in the price?

 

[Gilesc]

It is pre-installed, the media is provided as well.

To be honest, Windows 7 installations are very smooth these days anyway, just stick the disk in and answer a few questions.

 

[ThriceNightly]

thanks