tuckoralex 0 Newbie Poster

I purchased a used 2011 MacBook Pro laptop. It ran OK for a week but begin to slow down and now boots very slowly. I checked the drive spaces and found it has sufficient hard drive memory. Should I upgrade RAM. Currently it has 4 GB. I heard there are software that can speed up Mac. I havne't used any of them in my lifetime. DO they really speedup Mac?

Waiting for ans. Thanks.