Hi All
Please ensure that you have plenty of space available on your hard drive to install Trainz. You will need at least 50GB of free space when installing to C:\ drive.
Please note, if installing Trainz to a drive other than C:\ drive, you will still need plenty of free space on C:\ drive (recommend at least 25GB) for the installer to unpack into the Windows Temp folders.
Please also ensure that any security programs on your computer are not interfering with the installer. You may need to temporarily add the installer as an exception in any security programs.
Please also try setting the installer to run as administrator, which you can do by right clicking on the installer, and then click on 'run as administrator'.