When I switch on, or restart, or log off it takes me to the usual welcome screen (with a picture, time and date and connection and power icons). When I tap any key it should take me to the login screen with a box to enter the password - instead the time and date disappear, the image dims a little, and connection, access and power icons appear but no passowrd box. This lasts for 30 seconds, then it goes back to the welcome screen.
This goes on for a number of repetitions. Sometimes it will give me a login screen after 2 or 3 goes, sometimes a dozen.
This arose as part of a bigger problem. I seem to have fixed part of it but this issue remains. I have been discussing this in another thread but someone suggested I try elsewhere - if it is useful, details can be found here https://answers.microsoft.com/en-us/windows/forum/windows_10-performance/start-button-cortana-and-edge-no-longer-work-after/9953f113-efbd-4984-9223-ec28be79c1c1?msgId=01535582-4788-4af0-a687-eb989daf60a5.
Thanks for reading.