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Hi, You don’t have to worry. Since you have downloaded, you keep on performing it from time to time. This will delete all your temporary files from your computer. This will definitely make your laptop very fast.
Actually, PC Peformer is a rogue program. it keeps sending fake scan alerts to you and prompts you to purchase its full version. You take a look at this article. you will know what it is. it is a crap. http://blog.teesupport.com/how-to-removeuninstall-pc-performer-pc-performer-removal-instructions/