Recently, I decided to ditch both Enchanting and Alchemy in order to make money-gaining more difficult; I figured it would be alright to delete some mod called "Harvest Overhaul" that increases the number of ingredients you can get from animals/plants/enemies, yet (stupidly) deleted the mod without reading its uninstall instructions. Thinking everything had gone smoothly (not sure if Dawnguard.esm was present at that specific point), I then used BOSS to rearrange the load order (I had also deleted Dragon Combat Overhaul, waiting for the updated version) and was surprised to find Dawnguard.esm being one of the mods recognized by BOSS to have been added to the colletion of mods I already have, in spite of the fact I never once purchased and/or installed Dawnguard, physical copy or Steam-provided; now, the .esm itself was inactive and filled with dirty edits (+300, if memory serves), so I went ahead and had it cleaned using TES5Edit and checked the Data folder of Skyrim (in Program Files x86) in order to confirm Dawnguard actually being present - and indeed, Dawnguard.esm and Dawnguard.esp were both there! Finally, I headed over to my Steam account and checked for any changes in the DLC content section, but was told I own no DLC whatsoever... What. The. Heck. tl;dr What should I do with the two new files?