I thnink I've found the problem. Run this script and wonder [Confused]
code:
$oSvc = GetObject("winmgmts:root\cimv2")
$oInstSet = $oSvc.ExecQuery("SELECT Name FROM Win32_Process",,48)

? 'Running it for the first time'
For Each $oInst in $oInstSet
  ? "Process 1: " + $oInst.name
Next

? 'Running it for the second time'

For Each $oInst in $oInstSet
  ? "Process 2: " + $oInst.name
Next
It looks to me as if there's soem kind of recordset pointer involved which doesn't get set back, thus if you run it a second time it's at the end of the recordset.

Now I just have to find a way to set it back to the start without creating a copy of the object.
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There are two types of vessels, submarines and targets.