Windows cannot access \\Shared Folder – How to remove the saved credentials of sharing

SIDs(Security IDs) are the (greatly simplified) reason More info

PC1\ABC has the {example} SID of S-1-5-21-1106717361-1361586587-285947020-501238
PC2\ABC has the {example} SID of S-1-5-21-2533013469-2641548184-613786714-651000

As they are not the same, when ABC from PC2 gives their credentials, PC1 simply says You are not who I think you are. Access Denied
If the passwords/IDs do not match, then PC1 will ask for identification, and will allow connection as the PC1 user when the correct info is entered.

I have done some research and this article looks the most promising. I've copied the relevant part over.

Browse to "Local Policies" -> "Security Options". Now look for the entry "Network Security: LAN Manager authentication level" and open it. Click on the dropdown menu and select "Send LM & NTLM - use NTLMv2 session security if negotiated". Apply the settings.

In the Advanced sharing settings page of Network and sharing center, you need to have it set as Work/Home profile. Try:

-Enable network discovery
-Turn on file and print sharing
-Turn off password protected sharing
-Use user accounts and passwords to connect to other computers

The other settings such as encryption I have set as use 128 bit encryption.

Please check related policies.

1. Enter “gpedit.msc” in the Start Search box.
2. Open “Computer Configuration”/Windows Settings/Security Settings/Local Policies/Security Settings.
3. In the right pane, enable the following policies:

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

Also please disable the following policies.

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

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