How To Speed Up My Toshiba Satellite Laptop?

I have one of these laptops and I know it s an older laptop. Everything still works good except sometimes there is a lag on internet and opening files thru Word, etc. Is there any way to fix this through the computer without removing any files? I ve fixed what programs open up on start-up, ran a cleaner that I... show more I have one of these laptops and I know it s an older laptop. Everything still works good except sometimes there is a lag on internet and opening files thru Word, etc. Is there any way to fix this through the computer without removing any files? I ve fixed what programs open up on start-up, ran a cleaner that I downloaded online, and deleted unwanted files. If there is something that you can buy or do that would be helpful! thanks
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