Lost changes after Zenoss restart

I've been having "Bad counter" errors in the Events for some Windows machines.
This has to do with a filesystem called "System Reserved Label ...". There is no such instance.

So first I tried to put the monitoring off. This cleared the alert. However when Zenoss restarts they're generating events again.
No biggy, I don't use these so I just deleted the filesystem in Zenoss.

After zenoss restarts this filesystem is back again and I get the events showing up again.

Does zenoss has amnesia :p Anyone who knows what is going on

Thanks!