FWIW, I've not encountered any problems with my programs working with Windows XP SP2. My spyware sniffers, etc., have all worked well. The only problem I've encountered has to do with accessing the control panel/network connections. I get an message stating that an error occurred while trying to access C:\Windows\system32\netsetup.cpl. I've noted that other people are experiencing this as well (via a Google search). It's not an epidemic, however, and I'm sure there's a cure somewhere. When I find it, I'll let you know.