Netsys 9000WN (often associated with the Realtek RTL8188RU chipset) is a high-power wireless USB adapter. Finding official 2021 drivers for this legacy hardware can be difficult as the manufacturer's original support sites are often offline.
If you cannot find the specific 2021 file on the manufacturer's site, Windows often has a built-in solution that works for the Netsys 9000WN chipset. netsys 9000wn driver download 2021