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My computer is extremly slow, any ideas?
clean out all your temp files as well, http://www.ccleaner.com/ "ccleaner" is a great program to do that for you, you'll be amazed at all the crap that builds up, and how much there actually is.
–also in that program theres a startup tab which allows you to have a quicker startup by disabling any programs you dont need. i suggest cleaning up your startup as well, as the processes being uneccessarilly used in the background can cause a decrease in performance as well.