Error Loading the TCP MIB Library

When trying to add a standard printer with a TCP/IP port to a Windows XP 
installation I got the  following error: "Error Loading the TCP MIB Library"

The solution was to make sure the correct DLL:s were in the windows\system32 directory.
I found this out by reading http://support.microsoft.com/kb/261302

"This behavior may occur if a third-party version of the Wsnmp32.dll, 
Ntprint.dll, Tcpmib.dll, Mgmtapi.dll, or Snmpapi.dll file has been copied to 
the %SystemRoot% folder."

Make therefore sure the following files are in Windows\System32 directory:

Wsnmp32.dll 
Ntprint.dll
Tcpmib.dll
Mgmtapi.dll
Snmpapi.dll

Files may be copied from another (working) XP installation.
Language does not seem to matter.
English installation may be fixed by copying Swedish files for example.