|That is right. Manufacturers of computers do not allow you to make overclocking changes in their BIOS because their hardware is more basic than what you would purchase separately and probably would not stand up to the additional stresses of overclocking. Also they do not want someone to cause this damage and then expect them to replace the computer with a new one. You will need to leave the computer as it is. You can often get a really nice performance improvement by adding a distinct gaming video card it you are still running the stock onboard or basic video card that the system came with. Many can also benefit from adding additional memory from what the factory supplied, depending on how much that was.|
If you want to get into overclocking, you will need to start from scratch with a custom built system (to answer your next question before you ask it, no you will not be able to use much of what you have, so keep it in workable condition and start over).
You have to be a little bit crazy to keep you from going insane.