Microsoft Windows 7 Disc.
You need to use the COA that comes with your PC or purchase a new COA as this is a disc only.
These work on ANY brand of computer.
Only 1 disc is provided, (although there are a choice of 4 versions; Home Premium 32 Bit, Home Premium 64 Bit, Professional 32 Bit, Professional 64 Bit).
No code (COA) is provided.