Friend of mine got hit with a parasite the other day which installed a symlink to msupdater.exe into the "All Users" Startup folder, which reinstalled the parasite's registry keys every time a user logged in to his Windows XP system..

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"The greatest good you can do for another is not just to share your riches, but to reveal to him his own." – Benjamin Disraeli
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Ford Fox-body Owners Club -- http://www.ford-fox.org