Hi, Does anyone know what this is? All-of-a-sudden, starting 2 days ago, whenever I attempt to turn off my PC after it's been running a while, I get a message saying RNotificationService.Pollerwnd is still running and do I want to end it. This never happened before. My PC always shut down immediately after I clicked the shutdown button. I haven’t updated anything on the PC for months. There is no reason for it to start behaving differently. When I go into Windows Task Manager I don’t see anything running under “Processes” or under “Applications”. Could this indicate I have something running – like a trojan – on my PC that I don’t know about? My suspicion is that RNotificatonService.Pollerwnd is some valid Windows thing that is left hanging, or keeps running, because of something new on my PC. I had something funny happen recently when I got a message in Internet Explorer that said something like the “web page certificate didn’t match the owner’s name but that it was valid”. This happened when I clicked thru some discount site to buy something on Amazon. Maybe this could mean I was on a bad page that gave me malware? I'm sorry to say that web certificates and the concepts around them are mumbo jumbo to me. By way of background, I have XP Service Pack 1, Internet Explorer 6.0, Norton Internet Security 2004 (a firewall and anti-virus), and I use Verizon DSL.