If you are running Bitcoin Core (formerly Bitcoin QT), your entire financial future resides in this file. Lose it, and your Bitcoin are gone forever. Let a hacker access it, and they are gone. Corrupt it, and you face sleepless nights.
Open Command Prompt or Terminal and navigate to the Bitcoin Core installation folder (where bitcoind.exe lives). Run: bitcoind -salvagewallet This tool brute-forces reading the Berkeley DB (the old database format Bitcoin Core uses) and tries to extract private keys from a broken file. Bitcoin Core Wallet.dat
If you are technically elite, private keys are often stored in a recognizable format. You can open wallet.dat in a hex editor and look for the 0x3081 sequence that indicates an EC private key. This is for experts only. If you are running Bitcoin Core (formerly Bitcoin
C:\Users\[YourUserName]\AppData\Roaming\Bitcoin\ Note: AppData is a hidden folder. Type %APPDATA%\Bitcoin into File Explorer’s address bar to jump directly. Corrupt it, and you face sleepless nights
Do not delete the file. Do not reinstall Bitcoin Core.