When installing SQL Server 2008 one can run into “‘Reboot required check failed” situation. After seeing it few times already, I think a solution is worth mentioning. “Why don’t you just reboot?”, you say… Well, most likely it would not help you, but try it first. If this would not help, then try the following: Start regedit.exe Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager Locate PendingFileRenameOperations Remove any data associated with the value (you may want to export the value for later review) Reboot and rerun installation, check should pass. Update. As a respond to some comments about solution above not always work you may consider the following: Make sure that after you reboot entry in the registry does not reappear. If it does, remove it again, but do not reboot, just go ahead with installation process and click “ReRun”. Most likely you would be fine now. You may also try and see that other Co...