im an accountant running a small firm . i want to know which is the best laptop for my profession.I very often find my stem crashing and am fed up of handling virus problems!

As your need is business then choosing a laptop for you will be hard.

Regarding system crashing often because of virus, if you use Windows based system then taking few precaution will solve your problem. You can read this article : Protect your System using Effective and Free Firewall

Also, if you can give your budget then it will be little easier to suggest most appropriate laptop.

why dont you try out Mac? as far as i know mac is not affected by virus.

Ya, it does. As well Linux is also virus free. 99.99% and same is with Mac