http://www.netcodeilluminati.com/blog/cs-go-tips-and-tricks-cs-go-guide/

Above is a link to run the correct config settings for CS:GO. Since everybody has fresh copies of the game, you do not have to delete and reinstall as the first steps suggest. Do everything else..EVERYTHING ELSE. Treat this as your flippin bible;everything written is law! With these settings you game will run better and you will have better registry, meaning your precision and accuracy will both be a lot better.