Norton Security Suite

Trend Micro VS Norton Security Suite. . .?

I now currently have Trend Micro Internet Security for my Toshiba laptop. At first it was the 2009 version but then I upgraded it to the 2010 version . I recently learned that Comcast includes Norton Security Suite for free. Should I switch to Norton or keep Trend Micro. My laptop is running pretty slow for some reason and I tried Disk Defragmentor and Disk Cleanup along with CCleaner. What should I do?

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