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If you don't know what it is and what it does and how it works. When your car starts slowing down by itself oneday you can cause an accident. Just that feature changing a basic tool you use regularly requires training. If you are to stupid to understand why you shouldn't be laughing.
Again, please, now as a coherent statement?
Assume you will lose your netbook at some point: encrypt the entire thing using truecrypt or similar, and make sure you can access vital data from somewhere else: either use dropbox, or use google docs, or whatever.
"If Diet Coke did not exist it would have been neccessary to invent it." -- Karl Lehenbauer