Please provide us with the following information;
How is your computer connected to internet ? (dsl/wireless/cable )
Is this error happening across your Online backup – included in the McAfee suite / the standalone Online back up utility ?
Could you please provide us with a screen shot for the same .
You may receive the “MOBKServerError5” due to a busy server or the McAfee's Online Backup servers are experiencing an issue.
Restart the computer once, follow the below steps and then try again to perform a backup.
Step 1: Clear all the Windows Temp Files: - (Navigation: Click Start > Run >Type Temp) and clear all temp files.
Step 2: Clear all the Local Temp Files: - (Navigation: Click Start > Run >Type %Temp%) and clear all temp files of the local user.
Step 3: Clear all the Temporary Internet Files: - (Navigation: Open Internet explorer > Tools > Internet Options > Under General tab) clear all temp internet files & cookies.