This indicates a driver conflict. Right-click the device in Device Manager, select Uninstall Device , unplug the adapter, restart your PC, and run the driver installer fresh before plugging the adapter back in.
Complete Guide to Andowl Wireless USB Adapter Drivers: Installation and Troubleshooting andowl wireless usb adapter driver
Right-click the device in Device Manager, choose Uninstall device , and check the box that says "Delete the driver software for this device." Unplug the adapter, restart your computer, plug it into a different USB port (preferably a USB 2.0 port if it is an older 802.11n model), and reinstall the driver fresh. 2. Frequent Disconnections or Dropped Signals This indicates a driver conflict