Repair Difficulty : High
For Windows 7 and later
1) Click Start Button and in search box type Control Panel and Click on it.
2) In Control Panel Window, Click on “Windows Firewall”.
3) Press “Turn Windows Firewall on or off”
Warning: You will need Admin rights to enable or disable Windows firewall.
4) Finally Click on “Turn off Windows Firewall (not recommended)” under each of the active network connections.
Warning: You can activate Microsoft Windows Firewall after Office 365 repair is complete.
In most case 5B4 error code in Office 365 should be resolved by now, if however the problem still persists please get your system checked by an expert.
If you are not able to resolve the issue following above steps, you can contact our 24×7 Chat Support for help.
Posted In: Office 365