Access not permited across network

Hi - my first post so please excuse any silly issues :)

I've recently installed two new PC's for a customer adding them to the existing network. I had previously tested both on my own network which includes Win 7 & Win 10 PC's. The existing PC's at the customer's site are running Win 10.

I'm having great difficulty 'seeing' all PC's across the network - even though I have made all of the drives both shared and 'permissions' set to [Full Control].

For ease of identifiacation, I'll call the 4 PC's on the new network, [A],[B],[C] & [D] -
[A] & [B] are the new Win 11 units; 'Master' & 'Client',
[C] is the existing Win 10 PC - 'Server' and
[D] the existing Win 10 PC - 'Slave'.

After some effort I can at least 'see' the [C] drives in the File Explorer on [A] but when I try to access any of the listed drives I am told "You do not have permission . . ."

I'm hoping that someone can suggest some setting that I must have missed.

I have seen a note about Win 10 needing a version > 1803 to allow file-sharing so I've checked that PC [A] is running what I assume to be 2004 - HOWEVER - I've just noticed that 'Version Nº' and 'Build Nº' may well be used indiscriminately and if I recall correctly the 'Build Nº' on [A] is 1025 - certainly lower than 1803 so I'm now wondering whether that is the root of this problem - - - and why would there ever be a file sharing issue with any 'version' ?

[EDIT]
I've just checked and I can access the drives on [A] from [B] - both are on Win 11 of course.

You say even though I have made all of the drives both shared and 'permissions' set to [Full Control]. have you done all the c drive which is crazy it means any malware or hack has full access you dont need to share c drive all drives are by default shared with a $ ie c$ which you must pass a admin username and password

By default it passes the username and password your logged in with its simpler to have the same username password on each pc as it it makes it seem less

1 I suggest you check every step of this checklist on every computer:
A consolidated network setup checklist for Windows 10 and 11 - my post #4 - TenForums
If you're wary of changing other people's setup then make a system image of every computer before you begin. I do so even though they are all my own computers.

J G said:

I'm having great difficulty 'seeing' all PC's across the network

2 I'm not sure what you mean by "seeing". Some of your checks & tests seem to have involved making conclusions from File explorer's Network section but I'm afraid that those results are not valid. File explorer's Network section has been unreliable for years and shows no signs of ever being fixed.
As you'll see in my checklist, it can be useful to have shortcuts on each computer to point to the other computers. That was what Pentagon was trying to get at very concisely. I think it will become clear when you look through my checklist that the shortcuts on each computer are mirrors of each other.


3 Is there any reason for the computers not to be updated to the latest Version 22H2?
The initial release Version of Windows 10 was Version 1507.
You can check supported Versions at
Windows 10 Home, Pro EoS - v22H2 is the final Version - MSLearn
Windows 11 Home, Pro EoS - MSLearn
File sharing worked before Version 1803.

J G said:

In an Ideal world ... I may well take the decision to harmonize all 4 to have the same log-in.

4 As you'll see in my checklist, having an Admin account to use to authorise the initial network setup [mutual access] can be very useful. You do not need to change any other user accounts, you can just add an Admin with the same name & password on every computer.



Best of luck,
Denis

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Best of luck,
Denis