I'm delighted the BIOS update worked.That option is grayed out Nothing works "normally" for me.
And you need to remove the small one above that too.I've done that plus many other things - formatted them all as NTFS, made it un-allocated, formated it as logical, as primary ....... I think I will just leave it as another drive for now.
You can delete it (the little recovery partition) using the diskpart command from an elevated command prompt. You may need to add the word "override" to the end of the command.
Google diskpart to learn how to use it.
Be careful you don't delete the wrong one!
I followed all the instructions from Growltiger and it worked for me.