Verify that the ClientProtocols key exists under HKLM\Software\Microsoft\Rpc, and that it contains the correct default protocols. Refer to the following table.
|
Protocol Name |
Type |
Data Value |
|
ncacn_http |
REG_SZ |
rpcrt4.dll |
|
ncacn_ip_tcp |
REG_SZ |
rpcrt4.dll |
|
ncacn_np |
REG_SZ |
rpcrt4.dll |
|
ncacn_ip_udp |
REG_SZ |
rpcrt4.dll |
If the ClientProtocols key or any of the 4 default values is missing, import the key from a known good server.