Re: New build
Retail is also only allowed to be installed on one computer at a time, as is OEM. They are identical in every way, except retail included both 32 bit and 64 bit and OEM must be purchased with hardware.
You can give Microsoft an call if you uninstall it from one system and want to install it on another.
AMD Phenom II X4 955 BE @ 4.0GHz + TU120E lapped - MSI 770-CD45 AM3 - 2x2GB OCZ DDR3 1333MHz - Sapphire HD 4870 - Samsung Spinpoint 500GB 7200RPM 16MB cache HDD - Tagan TG600-BZ Piperock - (Currently open test bed) - Windows Vista Home Premium 64bit.