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I got an 'error code 5' when trying to install TweakMASTER.

TweakMASTER Knowledge Base article KB0121

If you have received the 'error code 5', you have most likely tried to install the program by running the installation of an older version of TweakMASTER from the same directory where TweakMASTER 1.x is installed.

The program executable was originally also called twkmastr.exe, same as the installation archive, and trying to install from the TweakMASTER directory will produce an error as the installation file cannot replace itself in performing the upgrade.

If you are reinstalling TweakMASTER 1.x, the simplest thing to do here is to move the installation archive to a different folder and doubleclick to start it.

Better yet, consider upgrading to the latest version of TweakMASTER and install it normally.

You should not get the error code 5 message again.