I currently have comodo antivirus, but my laptop was goin really slow so i downloaded another anti spyware programme and when i scanned my laptop with that it found lots of spyware as well as some dangerous trojan viruses. however when i tried to remove these viruses it said that i would have to register and therefore purchase software in order to do so,so i havent. why didnt my free comodo software detect these problems? and which is the best completely free anti virus/spyware software?help!
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