Find the make and model of your wireless adapter.
Go directly to the manufacturer's website and download the appropriate driver for that adapter with respect to your computer's operating system and version.
There should also be some support documentation with installation and configuration instructions. E.g., a User Guide/Manual and possibly a Quick Start guide.
And you can google for more information and tutorials/video "how-to's" that can help. Just seek those matching your adapter's make and model.
And there also may be an option somewhere that prevents automatic software or driver updates. Automatic updates can be problematic as a corrupt or faulty update can take a machine down and you may not immediately know what exactly...