brahs, how do i fix my desktop?

acer hdmi i-3 cpu (whatever those mean)

for the last two weeks, it's been slow af. last few days, it won't even open the start menu.

all we use on it is chrome, firefox, microsoft office (word, excel), sometimes scan or print chit.

i restarted it today to see if that would fix the problem but after starting up and logging into the user account, the scre