This is a licensed product key for 1 machine. You do not need this product if you already have a Windows 7 Professional License on your computer and are just trying to repair it. This product is for UPGRADES , DOWNGRADES(From windows 8) from any product OTHER THAN Windows 7 Professional and for New installations
It will do a full load of your software in complete fashion with ease.
Instructions are IN THE BOX to help you understand removing old drive partitions. This is not just a DVD Disc and a prayer that you know what your doing.
No need for you to know how to format our Customized software will format your drive before it loads Windows for you.
This product will Load BOTH 32 bit and 64bit Windows 7 Professional software and License it properly with Microsoft.