i have an anti virus that I bought, but when sometimes I hit a link or something on the internet, it will automatically detect a threat and it shows like its scanning something like in red color, and it tells me to install something, which is not even related to my anti virus, it seems like theres something totally different that its scanning, like it says anti virus threats scan, what is this? what should I do?

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download xbox 360 games

I'm looking for some good free virus scans/spyware detectors available online because my McAfee trial has run out on my new laptop. They can be either used online or downloadable. No scams please!

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download xbox 360 games