Please see the discussions in this thread in samskrit group. I hope you find it useful

https://groups.google.com/forum/#!topic/samskrita/9AX0JDws-DE


On Wed, Nov 13, 2013 at 11:18 AM, Matthew Kapstein <mkapstei@uchicago.edu>wrote:

>  Dear friends,
>
> Does anyone have some instructions for the use of the microsoft Sanskrit
> keyboard? It's
> easy enough to work out the basic consonant + vowel combinations, but I've
> not so
> far had much success with conjunct consonants. Any advice will be
> gratefully received.
>
> thanks in advance,
> Matthew
>
> Matthew Kapstein
> Directeur d'?tudes,
> Ecole Pratique des Hautes Etudes
>
> Numata Visiting Professor of Buddhist Studies,
> The University of Chicago