I've got an ancient HP ProBook 4510s here which I'm trying to find the proper (Windows 10) keyboard for.
The key labeled Ç is distinctive. Searching led me to the Wikipedia article on Ç, which has a section dedicated to computer input of this letter:
On Albanian, French, Portuguese, Spanish, Turkish and Italian keyboards, Ç is directly available as a separate key
That leaves us with 6 keyboard layouts to look up in the worst case scenario.
Wikipedia (of course) has a dedicated page for every keyboard layout and I've quickly found that your laptop has the Portuguese layout.