i was deleting some mods and when i went into the game and didnt have dawnguard on....... and i cant buy it again because it says you already got it. PLEASE REPLY

This is the Elder Scrolls Online (TESO) forum not the Skyrim / Dawnguard forum.

You might need to get a mod to put this into the Skyrim forum for you where you might find someone who know the answer to your question

Try going into your Steam library, Skyrim -> Properties -> Local files -> Verify integrity of game cache. It should download the missing DLC.

Or go into your recycling bin? You won't be able to download it again for free unless Rosveen's method works.

Awww........muffin. Why would you try to buy it again? You should be more careful next time.

It must work, or there must be another way to download it. The game is attached to his Steam account, so he should be able to install it on any computer he wishes - the same applies to the DLC.

I had moved my Dawnguard DLC to a different location on my computer thinking it'd just redownload again and it didn't. I really need to backup all of my DLC from FO3, NV and Skyrim. I have absolutely no physical backups.