Launcher Asking for Windows 'Update'

[NlaEid]

1. Downloaded Download Assistant and downloaded the game through it.

2. Download finished, pressed 'start installer', no response.

3. After a few more attempts, figured out that the problem was the launcher wasn't launched as administrator.

4. Success! It now responds but with something that I wasn't expecting:



I don't think I've ever needed to downgrade to windows 7 before. Please help!