I recently installed Trend Micro PC-Cillin 2005 on two computers (I have a multi-license version). Both comptuters run Windows XP Home Edition and both have Service Pack 2 installed. They're on a Linksys wireless network. The laptop accesses the network and internet through a wireless adapter card. PC-cillin virus file updates work perfectly on the laptop. The desktop computer is connected to the Linksys router. PC-Cillin deos not detect updates on the desktop computer and when I try to manually update the files, nothing happens. I've tried to work out a solution with the Trend Micro support staff, but they only suggest that I uninstall and reinstall the program. I've done this several times and the problem still exists. Does anyone have a clue as to how to fix this problem? Suggestions are appreciated! Thanks.