Solve : How to keep Mac running smoothly??

1.	Solve : How to keep Mac running smoothly??
Answer» I am NEW to Mac. When I first started, EVERYTHING was perfect. And I can still remember how fast it was. I have no idea of how to clean it. Any easy way to fix this problem? Thanks in advance!;)Did this system COME with any discs? A clean install WOULD be BEST of the OS and software.

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