Is Windows defender a useless program ?

  nemrutdagi 16:55 06 Feb 13
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Last week my pc got infected for nearly a week (internet and windows very slow). I used Wind Defender based in the good reviews and it told me everything was o.k. I have 3 browser and with Mozilla was getting a message that my pc was running slow and I should buy a program. Then I downloaded AVG and in 1 minute found 2 Trojan files which were destroyed. After that the pc is working normally. I post this because I want people not to rely in WindDef as I did and second I'd like to hear about similar experiences. Thanks.

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