You can use an IP address to access sharing, but an unknown user name or Password error is prompted by the machine name.

I can't connect to the company's sourcesafe early in the morning. If other people are connected, I don't want to use it.

The test shows that shared access is not allowed. The most strange thing is that shared access is allowed through an IP address, but not through the machine name.

The error message "unknown user name or Password error" is displayed ".

The solution for searching on the internet is as follows:
Run Group Policy Editor gpedit. MSC-> Enable Computer Configuration-> Windows Settings-> Security Settings-> Local Policies-> Network Security: LAN Manager (in XP, it is called LAN Manager) in the security options, if the default value is "not defined", change it to "Send LM and NTLM responses ".