ADT Plugin can't install: Missing requirement: Android Development Tools

Question

I tried to install ADT plugin on eclipse helios windows 64 bits classic. I got this error:

Cannot complete the install because one or more required it

Answer 1

If you're using Eclipse Juno (i.e. 4.x.x) on Win 7, and encountering problems installing Android ADT Plugin for eclipse, see the following to fix it:

1. go to where the eclipse.exe file located (default: C:\Program Files (x86)\eclipse)
2. NOT left click (run it) but RIGHT click on eclipse.exe
3. pick run as administrator.

Then it runs. Next, just follow the relevant Android guide on the matter (http://developer.android.com/sdk/installing/installing-adt.html).