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You want to install Exchange Server or install Exchange Server Cumulative Update. Once the setup starts, it goes through the steps and fails at prerequisite analysis. The message shows: A reboot from a previous installation is pending. Please restart the system and then rerun Setup. In this article, you will learn the solution for a reboot from a previous installation is pending in Exchange Server.

A reboot from a previous installation is pending

The below output appears after installing Exchange Server.

C:\>D:\Setup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataOFF /mode:Install /r:MB

Microsoft Exchange Server 2016 Cumulative Update 12 Unattended Setup

Copying Files...
File copy complete. Setup will now collect additional information needed for installation.

Languages
Management tools
Mailbox role: Transport service
Mailbox role: Client Access service
Mailbox role: Mailbox service
Mailbox role: Front End Transport service
Mailbox role: Client Access Front End service

Performing Microsoft Exchange Server Prerequisite Check

    Configuring Prerequisites                                                                         COMPLETED
    Prerequisite Analysis                                                                             FAILED

A reboot from a previous installation is pending. Please restart the system and then rerun Setup.
For more information, visit: http://technet.microsoft.com/library(EXCHG.150)/ms.exch.setupreadiness.RebootPending.aspx


The Exchange Server setup operation didn't complete. More details can be found in ExchangeSetup.log located in the
<SystemDrive>:\ExchangeSetupLogs folder.

Here is a screen of what it looks like.

A reboot from a previous installation is pending failed

The first thing that you need to do is to reboot the Exchange Server and then rerun the installation. If that still doesn’t work, you must clear a registry value data, which we will show in the next step.

Solution to a reboot from a previous installation is pending

To fix the reboot from a previous installation is pending in Exchange Server setup, follow the below steps:

1. Start Registry Editor

2. Go to the below registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager

3. Double-click on the key PendingFileRenameOperations.

A reboot from a previous installation is pending registry

4. The value data will have entries.

A reboot from a previous installation is pending edit multi-string

5. Remove all the value data and click on OK.

A reboot from a previous installation is pending clear value data

6. The PendingFileRenameOperations key data is empty.

PendingFileRenameOperations empty data

That’s it!

Now you can continue and Install Exchange Server or Install Exchange Server Cumulative Update without seeing the failure message.

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