This question already has an answer here:

I am looking for a free score writer for my Windows 7 PC.

I only have a total of 2 GB ram available in my desktop.

marked as duplicate by Cornelius, ᔕᖺᘎᕊ, Izzy, Izumi-reiLuLu, Undo Jul 17 '14 at 14:09

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.