Please try the following, open McAfee Security Center, click on Firewall> Settings
Click on Connections> Click on Add>
Type the IP Address of the Computer (B) and select the type as Home and Save it, follow the same steps with other Computer (A) as well.
Reboot both the computers and confirm the status
Thank you very much!! That did the trick and now I can access everything and print too!!
That is so great