That ASUS error commonly comes from the ASUS setup program blocking installation based on its OS check, even when the Wi‑Fi driver itself may still work on Windows 11.
Use Device Manager to install the driver directly instead of running the ASUS setup app:
- Download the latest wireless driver for the ASUS Prime B550M-A WIFI II from the ASUS support page.
- Right-click the downloaded ZIP file and select Extract All.
- Open Device Manager.
- Expand Other devices or Network adapters.
- Find the Wi‑Fi device, which may appear as Network Controller if the driver is missing.
- Right-click it and select Update driver.
- Select Browse my computer for drivers.
- Browse to the extracted Wi‑Fi driver folder and select Next.
This bypasses the ASUS installer and lets Windows install the driver directly.
If the Wi‑Fi device is not listed at all in Device Manager:
- In Device Manager, check whether the adapter appears under Network adapters.
- If it is missing completely, Windows may not be detecting it, and a manual driver install from the device manufacturer is required.
- Also verify in BIOS that the onboard Wi‑Fi controller is enabled.
If the adapter appears but still will not install:
- Make sure the driver is intended for the correct Windows architecture. On x64-based Windows, a non-x64 driver will fail with compatibility errors.
- In Device Manager, right-click the adapter and try Update driver > Browse my computer for drivers again using the extracted driver files rather than the vendor setup executable.
- If Windows reports no compatible driver, get the most recent driver from the device manufacturer.
If the network adapter is present but the driver state is corrupted, reinstall it:
- In Device Manager, expand Network adapters.
- Right-click the Wi‑Fi adapter and select Uninstall device.
- Check Attempt to remove the driver for this device and select Uninstall.
- Restart the PC.
- After restart, Windows will try to reinstall the adapter driver automatically.
Before uninstalling, download a backup copy of the driver on another PC and copy it by USB if needed.
If Device Manager shows Code 28, that means the drivers are not installed. The recommended resolution is to get the most recent driver from the device manufacturer.