If Namecoin Core or Namecoin-Qt is open, close it.
Make a backup of the "wallet.dat" file in the Namecoin profile directory.
Click the Windows button in the taskbar, and type "cmd" into the search box (no quote marks), and press Enter.
"C:\Program Files\Namecoin\namecoin-qt.exe" -salvagewallet
"C:\Program Files\Namecoin\namecoin-qt.exe" -rescan
Namecoin Core will take some time here (probably between 5 minutes and 2 hours, depending on how fast your computer is).
Start Namecoin Core as normal (via the Start Menu). If it worked, your wallet should be repaired.
Make a backup of the "wallet.dat" file in the Namecoin profile directory.
Click the Windows button in the taskbar, and type "cmd" into the search box (no quote marks), and press Enter.
"C:\Program Files\Namecoin\namecoin-qt.exe" -salvagewallet
"C:\Program Files\Namecoin\namecoin-qt.exe" -rescan
Namecoin Core will take some time here (probably between 5 minutes and 2 hours, depending on how fast your computer is).
Start Namecoin Core as normal (via the Start Menu). If it worked, your wallet should be repaired.