Thanks for the reply. I have tried again and get the same failure message.
The complete message is -
Unable to execute file: c/Program Files\Sweet Home 3D\jre8\bin\unpack200.exe
Create Process failed;code 2
The system cannot find the file specified

Does this help?

I certainlyn didn't cancel the installation. I'm not sure that I have Java installed but I can't get that to install either. Would that cause the problem?

I keep getting an installation failure with error code 2.
What does this mean?