Sometimes, companies will give away a laptop as a way of getting people interested in them or their products. But be careful! Crooks and scammers will also pretend to give away laptops, just to trick you into giving up your time or money. If you find a contest that is being run by a well-known company that has been around for a long time, you can be pretty sure that it is not going to be a scam or a rip off. Then it is worth your time to enter the contest. But no honest contest will ever ask you to pay money to be part of it. You should also realize that lots of other people will be in every contest that you enter. So your odds of winning will not be very good. Good luck!
I've known various websites to run contests involving all kinds of prizes, but be weary this is risky unless you have a good security system on your computer as many viruses can enter your computer if you click the wrong link. Also be advised no legitimate web page will use pop ups to tell you that you've won. I've personally had my identity stolen which, was ironic because for one they couldn't do anything with the info as I was 15 at the time, and two I am quite adept with computers and have a hand written security program that allowed the police to track the thief to his computer. lmao So be safe and I hope this helps.