On some workstations scheduled to upgrade the agent to ZCM 11.3.1.39328 we have error PRECHQ_PREVIOUS_UPDATE_PENDING_REBOOT but no known reboot operation pending.

In registry of this machines we do not find any reason for this error:
no entries in registry at
HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\PendingFileRenameOperations
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run Once
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run OnceEx
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Ins taller\InProgress
and
HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\Curren tVersion\RunOnce
HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\Curren tVersion\RunOnceEx
HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\Curren tVersion\Installer\InProgress

Are there more places to search for or what can cause this error?

Thanks in advance
Werner Seifert
Johannes Kepler University