Malwarebytes users have complained that their Windows network printers keep getting kicked offline. A fix is being tested in beta version 4.2.3.96 with component package 1.0.1112. Business users will have to wait longer as the beta fix is not available for business users. If you are not managing your printers via SNMP, you can disable SNMP on your Windows printers using the following steps: disabling the port on the printer’s port and disabling Web Protection is not an adequate solution.
Source: https://www.bleepingcomputer.com/news/software/malwarebytes-is-kicking-windows-printers-offline/