ok recently i recently bought a dell computer. I noticed that it does not have a power on/off switch on the back. whats up with that?. what if my computer locks up and theres nothign i can do.. should i just unplug it from the wall?.

If the PC locks up, hold the front Power button in for 10 seconds and the PC will shut off. :) I don't know why Dell omits the switch on the back from the PSU. :/

yeah that was the only way i could think of too.. but thanks for clearing that up... just had to make sure mine wasnt the only one without a switch on the back