HP Upgrade to Windows 8

[talksr]

Hi there,

I recently purchased a couple of HP Ultraslim desktops. They were Windows 8, but seem to come with 7 pre-installed.

I got one out of the box, upgraded to 8 and have used since (I am typing on it now). I have just got the other one out of the cupboard and it too has 7 on but I appear to have lost my HP upgrade disk.

 

Does anyone know if I can source this from the HP site anywhere?

I have the 64x version.

 

Thanks