Powerpoint doesen't necessarily need to be a 'small' program. If you are using large graphics and orchestrating movements it can take up quite a bit of CPU power. If you are using text than you are corrent it shouldn't take up many resources.
"In the time of chimpanzees I was a monkey" - Beck, Loser
"I do use compressors/limiters but not for controlling dynamics, I use EQ for that!" Jp22 (damn I miss him)
"Education is a progressive discovery of our own ignorance." -- Will Durant, historian (1885-1981)
"I try to get a boom out of the bass drum, in one of my albums, my CD, boom, I try to get that big boom, I could not get a big boom, I paid bucks, and could not get the boom" - Recording Expert, Tad Donley