These are just guesses on what you could look at.
New laptop or old laptop? The newer ones tend to have the mobile chipset with speed step stuff. At a guess if you just scan the registry for something like that (whatever appears in the properties of My Computer), you can work out what it is.
Unfortunately, not all laptops use laptop chips. Some of the old ones use the normal chipset so you'll have problems there.
There might also be an entry for a battery somewhere.