Okay I had Threatfire antivirus program on my computer.I thought that was enough but my security center message keeps popping up saying my PC is not protected and its found adware and someones trying to get into my system,blah blah.Do they do that so you can buy it or is it true??I took the threatfire off and was going to install AVG but in the middle of downloading it says another antivirus program was found,I went under add and remove programs I DON'T have another program,should I go ahead and install the AVG?
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