I have Trendmicro pc-cillin 2007 installed on a pc running xp home w/sp3. when the pc loads it takes a longtime and once it is ready for action it is very slow. I have found that there is a process called PcScnSrv.exe running it is using a large amount of memory usage. I found that it is part of the trendmicro processes. I try to set it's priority level to low so it won't slow the pc so much butit is a system process and will not allow it.