Can not install Android ADT 21.1 on eclipse Juno (Windows 7) after upadate to SDK 21.1

Question

I have download ADT 21.1, and tried install it on eclipse

I got those:

Answer 1

Select the updates to install and then crucially, uncheck "Contact all update sites during install to find required software"

I confirm that this answer by ing0 also works on Linux.