If you bought a branded dongle (e.g., TP-Link TL-WN725N v1/v2, Edimax EW-7811Un), visit the manufacturer’s support page. However, many manufacturers stopped updating drivers after 2016. Their drivers may work, but they are often older than Realtek’s own release.
The quickest way to install the driver is through Windows itself, which often has generic or verified drivers in its library. If you bought a branded dongle (e
: Re-enable signature enforcement afterward for security. TP-Link TL-WN725N v1/v2