Hi, All collection sites seem to be missing on the "SharePoint Server Enterprise Site Collection Features" in Site COllection Feature. However, I have PowerPivot uninstalled and reinstalled. Not sure if this could be the reason for it. Thanks

Hi Tom, Yes, enterprise is selected. Not sure if the following could be the case. http://support.microsoft.com/kb/2269585/

Hey Bernanrd, Have you been able to resolve the issue? TomTom Molskow SharePoint Architect - If I solved the issue please propose my reply as the answer - Thanks!

Bernard, Were you able to resolve this issue? Kaumil

I've the same problem after uninstall and reinstall PowerPivot. Try this: stsadm -o installfeature -name PremiumSite This command solved my problem. Hope this will help you.