I am getting the yellow-triangle warning on my internet icon in the system tray with the caption (upon click) "no internet access" even though my internet is working fine. I had this problem when I was running Win 7 and it still persists after my update to Win 10. Rebooting my modem and router sometimes clears the warning. Rebooting my PC does not clear the problem but sometimes a full SHUT DOWN and then restart will. Any ideas, please?