I recently uninstalled a Symantec antivirus client on a computer that is a hand-me-down from a friend, running Windows Vista Home Premium SP1. After uninstalling the program, I now have multiple blank popup windows that occur infrequently - there is no information inside and the taskbar shows a completely blank icon except for the Symantec logo. Multiple reboots have been unsuccessful in remedying the problem. The program is also still listed in the Programs option in Control Panel. I don't have any of the original install discs so I can't reinstall/remove it again to see if that corrects any issues.
Any advice from anyone who has dealt with similar issues? Thank you in advance for your time and assistance.