on which operating system u are working??
Well I work on many OS Vista ,2000 , XP and have installed many antispywares and in all OS i felt that Advanced System Protector is best as it gives routine updates of the latest definitions and is very easy to use..
The On Execution Scanner & Alert Shields make it more efficient in the case of internet access.
For me the Advanced System Protector is the Best Antispyware...U can also give a try...
free version of asp is also available at cnethttp://download.cnet.com/Advanced-System-Protector-Personal-Edition/3000-8022_4-10904375.html?tag=mncol