will downloading games make my macromedia projector have problems?

> will downloading certain software harm my computer?
> What should I do if after installing a software..if i uninstall it and
> there is still problems with my computer?
> What does it mean when it says that my macro media projector is not
> working....does that have anything to do with the game that I downloaded?
> Would the fact the the macro media projector is not working effect any
> part
> of my computer screen, such as not being able to pull up up files that i
> was
> using during this process?
> I cannot see them where the start menu is. Please help me!