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

In Eclipse, try:

Help > Install New Software

Then Choose the name you gave for https://dl-ssl.google.com/android/eclipse/ (working link)

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