Thanks PJF
I'm thinking if any peripherals/software which do not work I'll just leave it on the XP computer
I currently own a full version of XP however it is OEM
I found a sealed full version of Ultimate on Ebay for £219 but I presume you can only use one of the bit versions in the box?

Once again thanks
In the last few weeks I've learn't so much regarding upgrading PC's from places like these forums
;-)