Found out that a strange thing can happen after installing nw65sp6 and
on which some tricks are needed to solve the issue that where new to

After installing a nw65sp6 server, the disc drivers failed to load.

After which the server hangs completly.

This tid: 3715829

Gives the exact answer to it.

Renaming (or) deleting the servcfg.* and exclude.tpl file solved my

There is on request an updated NBI.NLM available, but deleting the
registry yourself, would be i think for now the best fix.