Totally OTT and unecessary unless you are a spook or from Al Quaeda. I fail to see why anyone would need to be anonymous on an open resource.
Use AVG AV, Adaware by Lavasoft, the new Microsoft anti-spyware suite, Ccleaner, any free firewall if you feel that you need one and regeseeeker.
these will clean and protect you more than you will ever need. Remember, people that use anonymisers have an imflated sense of their own importance.