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Call a local IT service hotline
If you experience the "computer moving slow" issue and you are unable to localize the problem by yourself, you can always call a local IT service hotline. Tell them more details about your problem and they will provide you with the best solutions to it.
To find a local IT service, type IT support and the name of your city in Google, Yahoo, Bing or other search engine. You can also check the yellow pages.
Format your computer (Reinstall your computer's operating system)
If your desktop computer or laptop is running slow and you did everything you could to make it faster, but you were unable to, consider formatting it. To format your computer means to delete all the data you have on it (your photos, songs, software and etc.) and start from the beginning.
This is a solution which you should apply when you run out of other alternatives, i.e.you have tried everything else, but your computer is still slow.