At the 50% point, the download stops and the message says, "Please close the following programs to continue: Internet Explorer" I did close Explorer after download started so I couldn't do anything about it. I said continue and it wouldn't let me continue. I reset PC and tried again with same results. I tried to uninstall the partially installed program and start all over but it said I could not uninstall until I closed Internet Explorer. I'm stumped...
Please check your Task manager and it might be possible that the internet explorer is still running in background. (Process name: iexplorer.exe)
Here is a link to open task manager.
Use the Task Manager's Processes tab.