@MonikaM 

Hello, thanks for asking.

Is there any error message when you try to connect to the X60 wireless on this laptop?
 
You may try to create a simple wireless network name and check whether it can be detected correctly:
https://www.tp-link.com/support/faq/1591/

If still cannot connect, try to disable fast roaming, setup QoS as standard, and clear all the high priority rules. You may also disable the anti-virus.

Try to enable the guest network to give it a shot.

If none of the above works, disable the Norton on the computer, then try to connect to the X60 again.

May it help and have a good day.