Troubleshooing failed workstations

Troubleshooing failed workstations

If this is already on the forums my searches have missed it.
I've got a number of failed workstations that I'm trying to sort out, the first part of that process being to remove the printers, access points etc. that got added when I scanned the network rather than the AD.  I can do it, but it's not straightforward.
The problem is that if I click the Delete button I'm told to "select the workstation[s] to delete" but there are no checkboxes.  I've checked the source of the page too, and there aren't even any that don't show.
This is SD+ build 7507, and it's the same in IE and Firefox.



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