You attempt to install Windows 7 on your personal computer. You receive an error message stating
that your product key is not valid. What is causing the error?
A.
You accidentally entered the product key in lower case.
B.
Your product key does not match the version of Windows that you are installing.
C.
The product key you are trying to use has expired.
D.
You reformatted your hard disk drive before you installed Windows.