If you are one of the “lucky” people to download the Office 2016 Technical Preview, don’t fret about the long install times. Personally, it took me 20 minutes to complete the installation. All the while there was an MS-DOS prompt in the background and I was too scared to close it down!
Note: when installing the preview, don’t click the setup.exe program in the main folder. This is a trick. Microsoft understand the temptation to click files called install.exe and setup.exe and took full advantage of our psychological weakness. Instead, you need to open your language folder and double click on the .bat file for the product you want to install.