make a backup of your wallet.dat

delete everything in the folder where it was

run latest qt

wait for new chain

close client when new chain full

move backup wallet over the one that the qt just created

launch qt with --salvagewallet option

just doing the --salvagewallet option won't do it. It's probably something in chainstate that needs killed, but it's easier to just wipe the whole folder and MAKE SURE YOUR BACKUP IS NOT IN THERE WHEN YOU WIPE IT!