Problem reading e-books protected

Due to a virus on your pc, windows vista system, I had to restore it to factory re-install will repair this system adobe digital edition to read eBooks purchased, which avvevo saved on usb storage, I noticed that the old ones I don't open anymore, you read only those purchased recently, you may have a different ID problem? You can possibly do the consolidation of all theadobe ID, or are there other ways to solve the problem?