Probally not going to be able since the bios is most likely locked. Download CPU-z and post up your motherboard. Its possible to use a 3rd party in windows program to overclock but your not going to get a high overclock. Maybe just a minor gain but it depends on the motherboard if its compatible with the program.
You mean prebuilt computers, right?if you have an intel chipset, it is IMPOSSIBLE to overclock, even with a program
Just what I was thinking. Although i'm sure that whats he means because Most prebuilts come with Intel internals.I hope your talking about with prebuilt computers.