Laurie52

Well, first off......Thank you for serving our country and for all the good work you will be involved in doing. Not enough is being reported but that's off topic.

"Oblivion" does NOT use SecuROM disk authentication. Neither does its first expansion, "Knights of the Nine" But its second expansion, "Shivering Isles", Does.

All it does is check to see that the setup file is running off the original cd/dvd, and that it wasn't copied to the hard drive. (Or you are using a .iso "image" disk...although you are the legitimate owner) Once the setup has been run, Shivering Isles uses the original (non-securom) validation system from Oblivion.

However, after Shivering Isles has been installed, it overwrites the original Oblivion's masterfile. Why you have to use the Oblivion disk to run this ...of course. But assuming the Shivering Isles SecuROM also checks further and why you are getting the error message.

I understand Oblivion GOTY does have SecuROM also. But do not know if it just in the Shivering Isles or its Oblivion has it. You did not say if you had the GOTY.

So I guess you just have to take your game disks with you after all.

I just ordered Oblivion by itself as I figure to get the expansions later.