Exchange 2007 – A reboot from a previous installation is pending.

Remove the following key will solve the issue most of the times:

HKLM\SYSTEM\CurrentControlSet\Control\SessionManager\PendingFileRenameOperations

Microsoft Exchange Server setup cannot continue because a restart from a previous installation or update is pending.

The Exchange Server Analyzer reads the following registry key to determine whether a system restart is required after installation or removal of a software update such as a security update, critical update, or hotfix.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Updates\UpdateExeVolatile

 
Continue reading…