Adobe Flash 10.1 works on admin login but not other logins

Latest Adobe Flash 10.1 (7/25/10) works on admin login but not other logins despite being installed "for all users". No change from 32-bit to 64-bit Internet Explorer 8 running under Windows 7. Repeated uninstalls/reinstalls/reboots has no effect. Using online uninstaller also has no effect. User Account Control is OFF. Interestingly enough, the same situation occurs on another computer with the same environment except running Vista. Any thoughts would be helpful to thomasgaryw@comcast.net Thank you!