Laptop and computer theft is a risk to all computer users, there are some simple and fairly cheap steps you can take in order to help reduce this risk and protect your computer from laptop theft.
In the office there are a few simple things you can do to prevent theft of your computers. First off, set a password on booting up, so that even if the computer is stolen, its useless as nothing can be accessed. A strong password is NOT a dictionary word, DOES contain numbers, letters and symbols, in a mixture of upper and lower case, and is at least 10 charachters.
Next back up everything on your computer, and keep a record of all your licence keys, and make sure you have copies of all the original software. This will make it easier to get back up and running if your do experience theft.
Next, buy a lock, something like a Kensington lock and chain the computer to a fixed object. This combined with a suitable alarm system will help reduce the risk of burglary.
Laptops are more of a risk, by their nature they are light, easy to carry and expensive. The perfect target for a thief. Carrying them around in a traditional laptop bag, it is obvious to anyone what you are carrying. Instead, go covert. Put your laptop in a backpack, or another type of holdall. Putting it in a laptop bag first will protect your computer from any scratches. Don't leave your computer unattended, this may sound obvious but it is amazing how many computers are stolen on a train or in a restaurant when left unattended.
The last measure is to insure your computer, as not all thefts can be prevented.