Ways in which to help speed up my laptop

Lately I've noticed that my laptop has been running a lot more slowly. Also it seems as if that the bottom of my laptop is very hot sometimes. I've tried deleting and freeing up space on the HDD but it doesn't seem to have made a difference. Ran a virus check with AVG and MalwareBytes too with nothing showing.

Was hoping if anyone could help me with some procedures or maybe some programs that might help speed it up.