restarting the workstation service worked for me. I need my Win10 build 2004 computers to connect to an old XP machine that has an xray scanner attached. The Win10 machine would no longer connect to the mapped drive, nor could I browse to that folder.
It worked fine just enabling SMB1 until this upgrade, then locked up the program to view the xrays. But restarting workstation service then back to normal. I don't know how stable it will be, so I rolled back to prior to the previous version for now.
Does the fact that restarting this service tell you experts what needs to be done then?