We find after examination that the antivirus has been disabled by a rootkit virus , malware and other Trojan viruses.
To resolve this we edited the registry and ran a Malwarebytes scan this removed the problems from the computer and gave us a position from which we could remove and reinstall the antivirus program.

Update: We installed the email on their computer systems, Apple iPhones and Apple iPad, the Toshiba laptop computer needed TCP/IP and winsocks resetting, and a desktop computer needed 2 antivirus programs removing, this was causing the computer to run slower.
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