Actually, when you reinstalled Windows, it may have moved your old data to C:\Windows.old or a similar name. I once did a reinstall of Windows and the previous operating system C:\Windows, Users, Program Files and all were moved to that folder. Check if you have such a folder. You need to find it fast because Windows is going to delete the whole folder automatically after about a month, and I'm assuming you reinstalled Windows today.

First, reinstall Atomic Wallet, it's going to be a clean state with no wallets imported but it will generate the C:\Users\\AppData\Roaming\atomic. If Atomic Wallet is running then close it. Rename the folder to something else (like atomic2 or atomic3).

Now navigate inside C:\Windows.old, and go to the path OmegaStarScream wrote:


Copy the entire folder to C:\Users\\AppData\Roaming\ and your old wallet should be there.

@OmegaStarScream, do you know if Atomic Wallet makes a folder in AppData\Local too? He might need to copy that as well.