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All in one
You need an "all in one"? Then check out Microsoft's "OneCare"
Spyware Protection
Spyware Doctor
Window's Defender
Ad-Adware SE.
Spybot
Hijackthis
Virus Protection
AVG
Avast
NOD32
F-Prot
Registry Cleaner
Easy Cleaner
Miscellaneous
Privacy Eraser
There's two versions. Privacy Eraser Pro is only a 15 day trial. Privacy Eraser is always free.
Privacy Eraser is not only good for privacy, but it is also a good tool to use to free up space.
You will notice your computer processes a lot faster after the first time you use it. It's another
desktop utility "must have".
Google Pack
All kinds of cool stuff.
Microsoft
This link will take you to the free trial software section at Microsoft.