Will it harm the computer if various soft wares are downloaded for FREE from the internet ?

suppose some one formats his computer and then enables network connection.Then he downloads a free anti virus .There after he downloads from the internet free soft wares like ms word, yahoo messenger,adobe reader, computer clean up, registry etc etc .If there is a potentially harmful site,there will be warning... show more suppose some one formats his computer and then enables network connection.Then he downloads a free anti virus .There after he downloads from the internet free soft wares like ms word, yahoo messenger,adobe reader, computer clean up, registry etc etc .If there is a potentially harmful site,there will be warning messages in the information bar and he can download from another site. Please give your valuable views based on actual experience. Thanks
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