Review on Enhanced Kensington Cable Lock for HP Laptops, Lenovo, Asus, Acer & Other Devices - Compact & Reinforced Pivoting Lock Head (K65035AM) by John Maynard

Does a pretty good job. While this isn't a complete protection against all thefts, it does prevent the usual grab and go, which is why I bought it. The quality is very good considering the price is under $20. Perfect fit for my Acer 5. Note that not all laptops use the Kensington slot. There is a tool on the Kensington website that will point you to the correct lock you need. I tried to provide a URL but Revain won't allow it and rejected my first review.