Hi,
follow the links to sophos and trendmicro in this topic
http://www.emuleforum.net/archive/topic/61214-1.html
or http://www.trendmicro.com/search/google/en-us/results.asp?lr=lang_en&q=wuamgrd.exe
http://www.sophos.com/search/index.cgi?search=wuamgrd.exe&action=search&submit=Search