A bug in Windows where SQL Server does not exist or access is denied

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The following errors often occur on SQL server:
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SQL Server Enterprise Manager
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SQL Server registration fails due to the following connection error. Want to register?

SQL Server does not exist or access is denied
ConnectionOpen (Connect ())
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The situation is as follows:
Host A is the Logon account of SQL server 2000 sp4: admin Password:
Machine B is the Logon account of SQL server 2000 System: admin Password:
Host C is SQL server 2000 sp4. When host B Sub-accesses host A sub-system login account: admin Password: c
It is found that a can access the SQL server of B, and c cannot work. It is also not possible to change the system password of Host a to d. Upgrade B to SP4.
The following is a summary of the bug: this error does not occur when the system logon accounts and passwords of the two sub-computers are the same (unless due to some network reasons ).

Time detected: (in the rain outside the window)

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