access to win10 pc from lan pcs

[pzbrawl]

A LAN has two win7pro pcs, a new win10Home laptop (replacing an older machine) and other laptops. The two win7pro pcs and the new win10 laptop form a development system for database/app/webapp software, and must be able to create & write files to most any folder on any of the three machines, anytime.

Essentially, we must be able to treat these three machines as if they were just one machine with several drives run by multiple instances of an admin user. That's how we work.

I can hear the corporate intakes of breath. For this request, lose that mindset: we're a family, not a corporation.

When the win10 laptop was configured and introduced to the network a few weeks ago, we managed to persuade it---against its corporate wishes---to allow such access without authentication requests.

Now, the win10 instance has updated itself, and since then, both win7 pcs encounter username & password requests on attempting to access the win10 laptop's drive c:. That stops us cold.

Worse, when the username & password are entered, we meet a further Orwellian requirement for a password for the drive on win7 machine from which the request was made!

How do we defeat these ludicrous requirements?

 

[Trouble]

Try responding to the credentials prompt by using the machine name of the Win10Laptop followed by a backslash followed by a username on the windows 10 laptop with appropriate permissions to access the folders / shares that it hosts and the password for that user on that laptop.
Win10Laptop\UserName
P@$$w0rd
check the box that says remember and you should be good to go.
It is not prompting you for Win7 machine credentials, the credentials prompt defaults to the local machine and you need to change it by including the other machine name with the username in the prompt's text box.

 

[pzbrawl]

Try responding to the credentials prompt by using the machine name of the Win10Laptop followed by a backslash followed by a username on the windows 10 laptop with appropriate permissions to access the folders / shares that it hosts and the password for that user on that laptop.
Win10Laptop\UserName
P@$$w0rd
check the box that says remember and you should be good to go.
It is not prompting you for Win7 machine credentials, the credentials prompt defaults to the local machine and you need to change it by including the other machine name with the username in the prompt's text box.

Read again.

Obviously the problem is not with win7 demanding credentials.

Nor does putting in credentials in some format fix the problem. The win10 machine was configured to not demand such credentials on the LAN---until Microsoft updated the instance of win10 and silently changed our setting.

The solution was to redo what Microsoft had rudely undone:

Right click on Network and select Properties.
Click on Change advanced sharing settings at left.
Click the down arrow next to All Networks at the bottom.
Select Turn off password protected sharing.
Click the Save changes button.