No Hide option on Vista Ultimate SP1 system

I have a failing optional wireless driver update that I'd like to hide.
I already updated the driver via a Dell update.

When I go to View Update History, and right click, I only get View Details,
and Copy Details options. No Hide Update option.

I am running as Administrator.

My Update process has been running non-stop for about a week with no progress.
I just rebooted and discovered a raft of updates pending behind that. On
this pass I seem to making some progress. But still no "Hide Update" option.

Dave.
.