If the one user not get online first check the system connectivity because Due to the some network issue system due to the network connectivity through maybe the network issue system user is unable to get online also and First we will check through the another network connection Try to another Wi-Fi connection or mobile connection if the system is on then we if the user is coming online through the How to spot the other network connection, so the network file together Then we give the if the IP address is automatic automatically, we will try to give the manual IP address with the system or reset the Drivers of network. We update the drivers of network in this way the network issue is fixed or you will check the browser we will check the any Any Software or any software or any browser or any company software. So user is unable to get online.Thank you 