New Windows8 computer.
Downloaded Office 365 then downloaded Lightroom after entering the licence key. The installation failed at point of updating files after download complete. I don't know why.
I tried to install it again and this time it asked to repair previous install which I Ok'd. It then said it had completed successfully. However, when I clicked on the Lr shortcut the pop up window then appeared to start the download again so I can't open the app.