I currently ran into an interesting issue when installing MS SQL Server 2008. During the initial checks at startup of the installation process I got the following error: “Restart required”. So I restarted my computer but without success. I got exactly the same error message again.

I found out that this happens due to a wrong registry entry. In order to get the prerequisite-checks to succeed I had to delete the value of the following registry entry:

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerPendingFileRenameOperations

I then re-run the prerequisite-check again and it succeeded.