Win 8 pro pack We couldn’t process your order

I recently came to this error, when I was upgrading a win 8 computer to win 8 pro. When I go and put in the credit card information, i get an error message:

“We couldn’t process your order”

This error messages is due to the fact that Microsoft is Out of Stock of win 8 pro pack.

Some how Microsoft ran out of Windows 8 Pro Pack product keys.

Here is the link:

http://www.microsoftstore.com/store/msusa/en_US/pdp/Windows-8-Pro-Pack/productID.255571800

Hopefully they manage to get more in, we need to upgrade.