nothing wrong with using a lot of different anti-spyware scanners
my new laptop has Norton Internet Security Suite, SpySweeper, Ad-Aware, and Spybot Search and Destroy on it so far
my old laptop has Avast Anti Virus, Zone Alarm Personal firewall, Ad-Aware, and Spybot Search and Destroy
my main tower has McAfee Security Suite, f-secure Blacklight, Rootkit Revealer, SpySweeper, Ad-Aware, and Spybot Search and Destroy
and my other tower is running Ubuntu Linux 6.10
I know I also have other security software on my new laptop and my main tower, I just can't remember what all of it is right now