Dan:
I don't use wireless, but I know enough to tell you that you need to configure that laptop connection so it's secure and it can't be tapped into by outside users.
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I personally use
Grisoft AVG Anti-Virus Free Edition 8.5.409 for antivirus protection and use
Malwarebytes Anti-Malware 1.40 and
SUPERAntiSpyware 4.27.0.1002 for malware/spyware protection - which are all free.
I personally don't use ZoneAlarm, CCleaner, and Secunia PSI.
Different users have different opinions on what they use and recommend, so I'm sure you'll get that here.
One thing that I'll strongly recommend that you don't do is to install and use registry cleaners, boosters, optimizers, etc.. They'll do nothing to improve performance and speed, and they'll eventually cause you grief.
And don't load your computer with a bunch of utilities, toolbars, and other useless and dangerous crap.
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