Illo CS5 - what font does Illustrator use for naming stuff in-program?

[heather_t]

I just cleaned out my installed fonts folder for native Windows 10 fonts, and one of those must have been the one Illustrator uses for the file name in the tab, when it's open. Anybody know what it's supposed to be? The one that has substituted is bold and the spacing is weird. Thanks! 

PS: I knew better, and did NOT uninstall any of the Myriad Pro fonts!

[Larry G. Schneider]

The fonts AI uses for in-app stuff are Verdana (four faces) and Tahoma (two faces).

[heather_t]

Thanks for that answer! It definitely gave me a clue. All six of those fonts were still installed, but there was one, Verdana Ref, which wasn't--and that ended up being the one I needed. Cheers!