axUpdate Setup Log Files

When something is not working as expected during installation I always check the log files first. For Dyanmics AX they are normally stored in the AX application Folder like for example:
C:\Program Files\Microsoft Dynamics AX\60\Setup Logs\2015-12-02 11-11-11

If you install an update with the axupdate.exe the log is created in another Folder: C:\ProgramData\Microsoft\Dynamics AX\Dynamics AX Setup Logs
%ALLUSERSPROFILE%\Microsoft\Dynamics AX\Dynamics AX Setup Logs

So keep in mind to check that Folder as well.