We recently upgraded to ZCM 10.3.1 from 10.3.0. We're trying to deploy the
update to all of our clients (Windows XP SP3, 10.3.0 Agent), and we're
getting mixed results. This summer we re-imaged ALL of our workstations,
and they are all built from the same image and build process. We have 3
sites all linked together with high-speed fiber, and we can't find any
issues with connectivity to our ZCM server.

We're getting this error in the System Update area of the ZCM console:

"One or more pre-requisite updates failed to install to this device. Ensure
all pre-requisite updates have been applied successfully and try again."

Not all clients are getting this error. The clients that do get this error
get it regardless of what I try. Windows Updates don't seem to make a
difference. Anti-virus doesn't seem to make a difference either.

I've scrubbed all the logs I can think of. I've increased the ZCM client
logging to the maximum amount of detail. Nothing about this error stands
out. I came across one old TID, but it didn't seem to make any difference
to this case. Is there something I'm missing? Are there any detailed logs
about what failed in the update deployment?