The installation is counterfeit.
The Product Key is from an AlienWare computer while the SLIC table and BIOS say it's a Gigabyte.
However, the board appears to be a retail one, which should not have a SLIC table in the first place - the installation has therefore been enabled by a hacker's Activation Exploit.

For what version and edition of Windows is the machine licensed, according to the COA sticker on the case??