What is the definition of 'another computer' according to MS?

[Atarian]

So if I buy an OEM/builder version of Win 7 vice the retail and install it, it "cannot be transferred to another computer once it is installed".

So now I guess what is Microsoft's the definition of a computer. If I replace the HDD, or video card, and for some reason I have to re-install, I think I'm OK. How about replacing a failed motherboard with one from the same manufacturer, but a newer model because the old was discontinued? How about a different manufacturer? What if the only thing original is the case? Or the keyboard? I've had the same IBM model M 'clicky' keyboard for forever. Does that count?

 

[SIW2]

Usually will be fine except if you replace the mobo.

Phone call to MS to say your mobo died and they will sort it out for you.

 

[Layback Bear]

Microsoft looks at the motherboard to decide if it's another computer. I have had a motherboard for a couple of weeks when it went bad. I was using Windows 7 OEM. When I installed a new replacement motherboard exactly the same I had to call Microsoft in order to activate. Some how they could tell the difference. The only thing I could see different was the serial number on the board in very small print.