As Scott mentioned, I would suggest seeking the latest drivers from your NIC vendor to ensure that you're up to the latest revs. Additionally, I would check the following...

Hi Parthipan,

You are correct; there "shouldn't" be any issues with the registry after applying the updates.

J. Jackson

Hi Parthipan,

Since the purpose of a cluster is to provide high availability (especially for server maintenance task such as OS patching) you should consider moving an active instance to another...

SQL Server 2000 and 2005 can co-exist on the same cluster. I have a two node cluster with a SQL Server 2000 and 2005 instance. They've been running...