opening files ive saved from the internet/viruses/internet explore

ive saved files into my documents from the internet but cannot open them-ive
have opened them before and think ive inadvertently done something so now
they wont open any ideas

also

ive got mcafee and still got a virus-how do i get rid of it

also when im using the internet internet explorer constantly pops up and
disturbs wat im doing-i also seem to get icons ive not requested or
downloaded and repeatedly hav to delete them
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winnie
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