Go upstairs to the Rec Room where there are two locked doors. Collect the Wire Cutters from the pool table and unlock the door held shut by wires. Enter Room 204 and examine the photos on the bed.

Oblivion's lockpicking remains essentially in Bethesda's re-release, which means successfully completing Oblivion Remastered is a finicky and seemingly unpredictable process. At least, that's how it ...