do i have to be some registered system builder or something crazy like that?

note:

OS purchase: http://www.ebuyer.com/product/123067

Answer:
hi there

yes of course,e-buyer sell oem software(original equipment manufactuer) to sell to system builders so as long as you buy another piece of hardware such as a mouse or keyboard then this is fine

oem versions of windows however have limited support and warranty so only purchase o.e.m versions if you comprehend windows and the installation process,as microsoft will give you little assistance if you get stuck

however you are more than welcome to contact me if you’ve any problems during the installation process

good luck mate !

Answer:
boy that's just a copy of windows nothing more…. don't wast your money get into the 2008 operating systems era don't go back to the year 2000, why run a old 32 bit operating system when you can have a 64 bit operating system for nothing with all the software free

check out

Answer:
No, its not illegal and there are no special stipulations. You'll just find that things like full documentation, bonus software and extras are not included.
Answer:
Absolutely legal. Computer building isn't like nursing. There's no say certification.
Answer:
nope it's fine, I got it from there.. don't anticipate any support if it's OEM though.. thats why it's cheaper.

yes it will be a legal version.

Answer:
No, it will be totally legal.