My computer dosent play sound

Whats up syschat
uhmm first i would like to say im not very good with computer language and stuff but ill try my best

Well
A little while ago my computer was having problems with space so it said i could free space by deleting programs, so i did so, programs that i figured i did not use
and i think thats the point where i messed up my sound (deleting something that is required or the actual program)
but i dont even have a little speaker picture in my bar at the bottom right?and its been like this for a long time
I need my music! please help!