Windows bug?

My time sync seems to have stopped. 

For several days I have had an error with my usual time server being unavailable. I turned this off and tried using the Windows own sync, This failed and I got a different message saying the last sync was in 2015. Yesterday it said last Wednesday. I am beginning to think this might be a bug with the last update.

I synced my WSPR beacon using my clock linked to a very accurate source online i.e. without the PC.  Of course, with the PC I cannot do this. The PC is needed for FT8 and WSJT-X.

Has anyone else had this issue recently and is there a fix please?