Windows 10: Lost network connection to QNAP NAS after Windows 10 upgrade

I tried this as well, no lucks.

 

Nope. I deleted the credentials related to both servers (yes, were WIndows credentials). I used the existing mapped drives, it asked for ID and password, and failed first time and every time for both devices. That's different than before because before I could connect to the IIS7 server if I entered the credentials the first time after rebooting. I'll try deleting the mapped drives and make sure the related credentials are removed again. Then I'll reboot, add the mapped drives to see what happens immediately and after another reboot.
Thanks for pointing me at the credentials manager, I've never used it before.

 

Okay, I deleted the mapped drives and related credentials. I rebooted, re-added the mapped drives to both the IIS7 and QNAP servers. Both worked perfectly. I rebooted and again and tried to access the two servers again. I'm back where I was originally with the QNAP server failing and the IIS7 server asking for credentials before connecting. Bottom line: no change from original problem.

 

Found this link Windows 7 Fixing The Mapped Drive Credentials Problem | The Gadget Grill and found it interesting. BUT, made no difference.

 

Couldn't get to the files on the NAS by wifi, found that the NAS had WORKGROUP other than WORKGROUP, actually it was set with my initials.
So I set the workgroup on the yoga to my initials, and hooray!