Windows often keeps a copy of basic, stable drivers in a local cache. If the driver is just glitchy rather than completely missing, you can force Windows to reinstall it without needing a download.
The safest method is to use the official support website of the computer or motherboard manufacturer (e.g., Dell Support, HP Support, ASUS Support).
Since the driver is not on your computer and you cannot download it directly, you will need to use a second computer (or your phone) that does have internet access.