tcpMDT
Before you begin - MDT26
2.1 BEFORE YOU BEGIN
Uninstall MDT26 if it is already installed on your system, whether it is a demo version or a licensed version. The installer will give you the option to uninstall previous versions of MDT26, but it is recommended that you perform this task first.
It is not necessary to uninstall MDT9 or MDT25. Both, together with MDT26, can coexist on the same computer without any problems.
More information: ANTIVIRUS - Recommendations During MDT Installation