Not Connecting to PCs

I have a MyCloud which will not connect to my desktop or laptop PCs. They are W10 64-bit. The problem has only arisen in the past few days. It may or may not be due to a brief power cut. Have only noticed since.
The white light is steady. I can connect and see all drive content via the internet. My digital music library stored on the MyCloud is all available to see and use if I use my Sonos system (either via PC or iPAd). So the MyCloud is definitely working.
I have powered off the MyCloud and re-set the Router. Tried re-mapping the drive (Z) and checked the Windows settings. MyCloud (and its WD predecessor) always used Wifi connections on home network to connect into PCs. Stumped at this point. Advice and solution gratefully received.

Hi @geoffconnolly,

Thanks for reporting the issue.

Have you opened a Support Case? If not opened, for more information, please contact the WD Technical Support team for best assistance and troubleshooting:

Thanks for the reply.

Problem solved. It seems a W10 update dumped my credentials for the MyCloud. Access now restored.