The ESS tray icon is yellow and virus database is 3220, other PCs have virus database of 3222. Attempts to manually update result in failure and a message 'Virus signature could not be updated - Undocumented serious error (0x101a)' is displayed. System is XP MCE 2005 with SP3. ESS 3.0.667.0, will try an uninstall and reinstall to see if is corrected. Update; Uninstalling and reinstalling 667 seems to have corrected the problem, at least for now. Will update this thread if I get any more information or problems. BTW does anyone know the meaning of the error code displayed?