Free computer speed up software

Sounds great but usually it isn't.  Lots of sites offer free computer clean up software, computer speed up, registry cleaners, etc., BE CAREFULL.  Often these programs are designed to sell you advertising or convince you to pay for them.  The worst part is that many of them will actually slow your computer down.  My favorite phrase is: We are taught as children not to accept candy from strangers.  Now we need to know not to accept software from them either.  If you get a program offer, before you choose the download link, go onto Google and research it.  If you find a lot of positive comments then it may be safe.  If you fi