Name: Ralink RT5390 WiFi Adapter Driver
Author: Ralink

Question 1

Install fails or rolls back?

Accepted Answer

Run the Ralink/MediaTek installer as administrator, temporarily disable antivirus, and remove any previous Ralink/MediaTek WLAN driver in Programs and Features before rebooting and reinstalling the correct 32/64-bit package.

Question 2

Device not detected?

Accepted Answer

Check Device Manager under Network adapters or Other devices, scan for hardware changes, confirm WLAN is enabled in BIOS and by any hardware switch, and reseat the mini-PCIe card if accessible.

Question 3

Version conflicts or Code 10/43?

Accepted Answer

Windows Update may replace the Ralink driver with a generic one. Use Device Manager > Roll Back Driver or Update Driver > Browse > Let me pick, select the Ralink RT5390 entry, then reboot.