Just a side note:
If you do this, you will end up with an unusable machine, there’s no two way about it. Manjaro requires you to keep it up-to-date. Read this, it’ll help:
Manjaro updates
Think of the following imaginary situation
When you use your system or shortly after login - a message appears - telling you there is updates available. When you click the message Pamac opens with the updates pane listing 100’s of packages ready to download/install on your system.
Almost per instinct you click the update now - provide your password and the flow begin.
Suddenly your screen goes blank - you wait - nothing happens.
You press CtrlAltF4 to access TTY - nothing …
Also , never install updates blindly. Keep an eye on the Announcements section for your branch. There is an announcement, with a list of gotchas and fixes before every Unstable Updates , Testing Updates and Stable Updates .