Your computer has temporary workspace called RAM (memory) that, like your desk, only has so much space. If it runs out of space (too many programs open), your computer can run slowly. Your computer also has a limited amount of storage space (hard drive). If it gets low on space, it can also make your computer run slowly. Let's look at checking your RAM and your storage space. CCleaner is a good free program for freeing up storage space. If you are running a Windows machine, defragment your hard drive.
To access task manager:(Windows) Ctrl+Shift+Esc
(Mac) Cmd+Opt+Esc
Tool to analyse disk space (Windows):
https://windirstat.infoTo uninstall programs (Windows): Start -> Control Panel -> Uninstall Program