Firstly, try using the LAN, wired connection. If the issue concerns only Wi-Fi connection, restart your modem and router.
www.office.com/setup - Sometimes, the user faces issues Wi-Fi keeps disconnecting on laptop this is a result of bad network and router setting. To fix this issue, you should uninstall some apps. In this published post, you will read the solution to fix Wi-Fi keeps disconnecting Laptop.
