When on client site, I encountered a strange error when trying to run the SharePoint Server 2010 Setup;
Setup is unable to proceed due to the following error(s):
A system restart from a previous installation or update is pending. Restart your computer and run setup to continue.
For the list of pre-requisites needed to install the product please refer to:
Correct the issue(s) listed above and re-run setup.
This message was appearing even though there wasn’t any updates, and the machine had been restarted.
Looking further into it, it seemed that an orphaned PendingFileRenameOperations registry key existed and needed deleting;
After this was removed, the Setup allowed me to install the product;