http://www.dougknox.com/xp/file_assoc.htm
http://www.trendmicro.com/spyware-scan/free_spyware_scan.asp
http://www.symantec.com/home_homeoffice/support/index_virus.jsp
http://www.canadiancontent.net/tech/freeware/Registry+Cleaners/
http://service1.symantec.com/SUPPORT/sharedtech.nsf/docid/1999051911110813