Running Windows '98

If someone is not understanding simple things easily and/or is physically slow and not energized, he/she is running Windows '98. *It helps to know if the person is usually smart and/or physically quick to make the judgement justified.*

*It is early in the morning*
What is 100 squared?
-Uhhh....
You need a reboot, stop running windows '98

Coach, I dont feel like running a mile today.
-Windows '98 wont help you win the game next week.

dumb, dumbass, idiot, retard, lazy, tired