Windows 10 & network share access denied

 Symptom

This is what you see when you try to go to any \\something network share:

\\something is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions. The account is not authorized to log in from this station.

Solution

Fire up the registry editor (regedit). Navigate to:

HKLM\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters

Here, you will need to create a new parameter (32-bit DWORD). Right-click:

Then, name it AllowInsecureGuestAuth and assign it a value of 1.

The hive should look thusly:

And you're done. Reboot, and enjoy your network access.

 https://www.dedoimedo.com/computers/windows-10-network-share-access.html

And more reference:

https://blog.xuite.net/yh96301/blog/548723165-Windows+10+%E5%AD%98%E5%8F%96%E7%B6%B2%E5%9F%9F%E5%85%A7%E5%88%86%E4%BA%AB%E7%9A%84%E8%B3%87%E6%96%99