You are likely encountering an error message like:

Tahoma is a standard Windows font. You likely already have it in C:\Windows\Fonts Microsoft's Official Source:

MS Shell Dlg 2 Font Download: High-Quality TTF Guide If you’ve ever delved into Windows system customization, software development, or UI design, you’ve likely encountered the name . Often misunderstood as a specific typeface you can simply pick from a dropdown menu, it is actually one of the most critical "logical" fonts in the Windows ecosystem.

You can find it in:

This is the definitive high-quality TTF — clear hinting, proper kerning, and support for Western, Greek, Cyrillic, Arabic, and Hebrew scripts. It is vector-based, so it scales perfectly from 8pt dialog text to large headlines.

An application is throwing a "Font not found" error specifically mentioning Ms Shell Dlg 2.