Windows 10, can ping other PC but cannot access shared folders! What gives?

I have a computer running Windows 7 that shares a Git repo on drive D. Let's call this PC "win7". This repo is the origin of a project that we push to and pull from.

The network is a wireless network. One PC on this network is running on Windows 10. Let's call this PC "win10". Win10 can ping every other PC on the network including win7. Win7 can ping win10. Win7 can access all shared files on win10. Neither of the PCs have passwords.

Problem: Win10 cannot access any shared files on win7, not from Explorer, nor from Git Bash or any other Git management system (E-Git on Eclipse or Visual Studio). So, win10 cannot pull/push. Every other PC on the network can access win7 shared files and push/pull to/from the shared Git origin.

What's wrong with Windows 10?

I have tried these:

1. Control Panel\All Control Panel Items\Network and Sharing Center\Advanced sharing settings\ File sharing is on, Discovery is on, Password protected sharing is off

2. Adapter Settings\Properties\QoS Packet Scheduler uninstalled and re-installed

3. Adapter Settings\Properties\File and Printer Sharing uninstalled and re-installed
4. Adapter Settings\Properties\EVERYTHING uninstalled and re-installed

5. gpedit.msc\Computer Config\Win Settings\Security Settings\Local Policies\Security Options:

   Enabled These:

   • Network access: Allow anonymous SID/name translation
   • Network access: Let Everyone permissions apply to anonymous users

   
   Disabled These:

   • Network access: Restrict anonymous access to Named Pipes and Shares
   • Network access: Do not allow anonymous enumeration of SAM accounts
   • Network access: Do not allow anonymous enumeration of SAM accounts and shares

6. netsh int ip reset, and then restarted

7. netsh winsock reset, and then restarted
8. AdapterSettings\ Enabled NetBIOS over TCP/IP
9. Tried changing to static IP
10. The new windows 10 Control Panel\ Network Reset
11. Firewall is turned off

All of these were tried to no avail.

AT LAAST!! After 4 month, and seeing the error for the second time, I found the solution here:

https://support.microsoft.com/en-us/help/4046019

Turns out, if you type the ip in "Run", and only in "Run", a very specific error shows up that contains this message: "your organization's security policies blocks access..."

Searching that lead me to this solution:

Open "Local Group Policy Editor" by searching in Start Menu or going to Run and running gpedit.msc, then go to Computer Configuration\Administrative Templates\network\Lanman Workstation and: "Enable insecure guest logons"

And that solved the problem.