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#11
Advanced System Care is one of the best ways to turn a completely useful computer into a door stop. Any thing from IObits is a scarey thing.
If you want to wring every last bit of "optimiztion" do these : Optimize Windows 7
Theres no one click way to do it right. Do the things in the tutorial I linked to and run Ccleaner once every week o so, depending on your usage.
I used to work for a company that offered remote support. I did a lot of pc tune-ps for them on their customer's machines and per our procedure we used tune up utilities so among the that's what I would choose since I have used however I would not use the registry cleaner component. I'm not sure that it would be worth buying though. The important thing is to have enough ram. You never answered my question on how much you have. If you don't have at least 2 gb that would be the best use of your money IMO.
I do not use or recommend any third party optimization programs. I know that these one click software packages are very appealing to the inexperienced but they are marginally useful at best and harmful at worst. Advanced System Care is in the latter category. These programs claim that they are suitable for experts but few will touch them.