С каждым обновлением винды одно и тоже - поиск этого рецепта
I just did another upgrade to build 9879 and it broke the Shared Folders here.
I found the root cause though the migration lost a registry setting and once I corrected it the shared folders feature continues to work again.
All you have to do is edit the registry
Data: "RDPNP, LanmanWorkstation,webclient"
Data: "vmhgfs,RDPNP, LanmanWorkstation,webclient"
Exit the registry application
Then you will then have the shared folders drives and UNC paths accessible once more. No need to reboot or log off. No need to uninstall and install tools again.
Hope this helps if you also see this issue.