Avast user interface > Protection > Core shields reports that all of the 4 listed shields are ON. However if I R-click the Windows 7 tray icon and hover over Avast Shields Control it reports that 1 shield is disabled. Clicking on "enable" does not enable it. Clicking on "disable for..." turns off 4 shields and thel report then says that 5 shields are disabled. "Enable all shields" only enables 4 - 1 is left disabled (or sometimes 2 are left disabled). Never says which. Going to Control Panel > Programs and selecting "repair" does not fix the problem. Neither does uninstalling and re-installing. How do I fix this? I had this same problem with my Windows 10 desktop computer, and doing a repair fixed the problem. But with this Windows 7 laptop, the problem remains.