Verify the registry keys

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.

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