Tridion 2013 CME has stopped loading and throws an "invalid license" error. We have already confirmed with SDL that the licenses are good and they even provided temporary license files which didnt help resolve the issue as well.
Another thing that we noticed is that the Tridion MMC snap in is not properly as well. It throws error :
"Could not read configuration item. Modification of this item is not available on this machine. Automation error, the specified module could not be found".
When we click on "general settings", the error is a little different :
"Error while getting security setting.Automation error, the specified module could not be found"
This happened on 3 servers and the only common change on all the 3 servers was the patching done. We have already verified that java/.net framework versions were not affected by patching.