Computer select glitch
Hi guys! I was loading up my Mac for like the 4th time today but this time there was a glitch. Whenever I select a file, it auto selects it and won’t deselect even when I press another file (kind of like I’m selecting multiple files). Also, whenever I try to open an application, it sends me to the applications folder instead of opening the app. It’s really annoying! Does anyone know how to fix this?!? Thanks!
iMac 21.5″, macOS 10.15