Error “A reboot from a previous installation is pending” during Exchange InstallUninstall

Scenario:  When attempting to install/uninstall Exchange, you receive the following error during readiness checks:

“A reboot from a previous installation is pending”

Even after a reboot, it doesn’t clear this error.

Solution:

  1. Clear values out of the PendingFileRenameOperations key located at: HKLMSYSTEMCurrentControlSetControlSessionManagerPendingFileRenameOperations
  2. You may need to clear out the content of this key as well located at: HKLMSystemControlSet001ControlSessionManager
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