CMS - Cannot Connect

HI,

I have one CMS 14 serving multi locations. Recently I have one laptop that cannot connect to CMS. I am getting "A connection to the specified CMS Server could not be established." However, ALL OTHER USERS (LAPTOP & DESKTOPS are connecting without any problems.
1) I try using different network connections/ports without any luck.
2) I uninstalled and re-installed CMS without any luck.
3) I manually set the port settings; from auto to full but I still cannot connect.
I am using a Lenovo X300. Note, I do have other X300 users that ARE NOT experiencing this problem. Any ideas how I can resolve this problem?

Any help will be apprecited.

I didn't find the right solution from the Internet.

References:
https://support.avaya.com/forums/showthread.php?t=91
Consumer Electronics marketing Video

Thank you.