Unable to connect to PC on same network, says wrong password but it is correct

[King Mustard]

I have two PCs on my network, Upstairs-PC and Downstairs-PC. Both run Windows 11.

I recently had to reinstall Windows 11 on my downstairs PC.

Since then, even though I believe I have set up sharing as normal, when I try to access \\Downstairs-PC, it tells me my credentials are incorrect.

Both computers are logged into my Microsoft account.

I have tried entering my Microsoft email address as my username, as well as Downstairs-PC and .\Downstairs-PC.

For the password, I have tried both the system password and the password to my Microsoft account. Neither are working.

I have disabled the firewall on both systems, just in case.

Any ideas?

 

[ChrisD.]

If you are using a local account, put .\ before the local username, and type the password in as normal. If you are using a Microsoft account, you need the entire account, ie, [email protected]

 

[Robert T.]

I would even say you need to put "Downstairs-PC\username_from_Downstairs-PC" and creds for it, rather than ".\" in credentials box on Upstairs-PC
If you use ".\username_from_Downstairs-PC" , you'd be putting username from Downstairs-PC but looking for it in "Upstairs-PC" user database.. Despite this being same M$ account - it would be different SID, hence it may have problems..