Windows 2000 SP4 upgrade for BO 5.8.1 and WI 5.5

Ok, stupid question time.

I have one Windows 2000 server running SP3. I am in the process of updating this to SP4 and would like to know if there are any issues/things to look out for. This server is running web intelligence 5.5

I do have another similar server running BO 5.1.8 so any feedback that would be useful and appreciated.

I will post this question elsewhere on these forums to covere both aspects, so please excuse the duplication

Regards