Of course it is legit to get a free computer from give aways. A lot of agencies and organizations undertake such give away programs through which they offer free laptops, computers, tablets, etc. to the needy people. However, note that, there can be various give aways which cannot be trustworthy at all and just a fraud. Hence, if you see any giveaway, you should see how trustworthy, genuine it is. Get information and do some research about that organization first, and if you find it trustworthy only then apply for the same. If you go for a giveaway of any well known organization, they will always be helpful for you. You will get a proper working laptop from such organizations in most cases.