Get rid of some of the rubbish thats left behind when you uninstall an old program using something like ccleaner click here and defrag regularly. Also check whats running in the background and shut unneccessary programs down.
Laptops in general cannot have their processor upgraded. Sorry, but the lack of opportunity for upgrades is one of the reasons I use a desktop (plus I play a lot of games and laptops aren't good for that).
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