If you're on an Windows XP or Vista box and live in the U.S...

[Kagamin]

Steven Schveighoffer Wrote:

> OEM copies are not transferrable, but those will only work on the vendor's  
> BIOS key anyways.  So they are "technically" transferrable to another  
> system with the same vendor, but I don't think the license officially  
> permits it.

I think, OEM copy can be transferred with computer on which it's installed.