and install it , it will automatically uncheck the toolbars and unwanted programs when you install something downloaded on the net.
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Look in your start menu / programs / Windows Updates to see if there's nothing which waits to be downloaded and installed(take all , but not languages packages or bing desktop)
1 more question... I noticed there is a folder called Program Data in the root of C:\, I do not remember it before, it looks like a copy of my program files folder, can I delete it.?