What's the firmware version of your W9980? How many devices are connection when it crashes? ADSL light and internet light are normal all the time? Did you try to contact TP-LINK support team?...

You are suggested to contact ISP to check the line as it loses sync... Provide a screenshot of Status page when connection drops.

There is a Win10 compatibility list for your reference. Some adapters are plug and play on Windows 10 because the driver is embeded in the system. http://www.tp-link.com/en/article-15587.html

Try to change channel from auto to 157, 153 or 149. About wireless coverage, generally, the lower the frequency the farther a wireless signal can travel. Therefore, devices on a 5 GHz network will...

Is it WPA4220? To press the Wi-Fi/Wi-Fi Clone Button for 5 seconds will enable or disable the wireless function. As the Wi-Fi/Wi-Fi Clone LED light is off, it should be disabled. Try to press the...

TD-W9980, right? Firmware is up to date? Wired connection to W9980 works fine? Try channel width 20MHz to see if it helps.