Open Device Manager, right-click the wireless adapter, select Properties, go to the Power Management tab, and uncheck “Allow the computer to turn off this device to save power” .

If the automatic installer fails, you can use Windows' built-in Device Manager to update the driver. This method is also useful if the adapter is showing up as "Unknown device."

Select the folder where you extracted the downloaded files and click

Remember: The hardware is almost certainly a generic Realtek or Mediatek adapter. Stick to official sources, disable USB power saving, and you will have a stable WiFi connection within minutes.

To set up your Quantum QHMPL-0119 UL Wireless USB Adapter, you will need to install the compatible 802.11n WLAN drivers. Since official Quantum manufacturer links can sometimes be difficult to navigate, you can use general high-performance drivers for 802.11n USB adapters which are compatible with this hardware. Driver Easy Step 1: Download the Driver

Disable the power-saving setting for the adapter. Go to Device Manager > Network Adapters > Right-click Quantum Adapter > Properties > Power Management > Uncheck "Allow the computer to turn off this device."