Microsoft Security Essentials
A newer version of Microsoft Security Essentials is available.
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Full user review
"Very Good Security Suite"
Light on resources. Does a good job. Probably enough protection for most people.
Haven't found any yet.
Have used Norton, McAfee, AVG and Zone Alarm over the years. All 4 have major downsides including being a resource hog, slow to function, and sometimes hangs up or crashes computer. In particular the last one I used was Zone Alarm. Would not recognize that my primary email software was Outlook Express and hung up the computer when shutting down. Their technical support is horrible.
My computer is running more efficiently and faster since I loaded this software on my computer.
I would strongly recommend using this product for most people.