I need help to unlock my passphrase. I don't remember setting up one, but now there is a pasphrase. Eitherway I am unable to send out coins from my LitecoinQt to the exchange.
- Change your client software?
- Change your operating system?
- Install Updates eg. Java/Qt/...?
- Swap ISP?
- Checked blockchain.info (for transactions on your wallet?)
My first assumption would be that you got hacked (if your wallet.dat was in it's predefined environment) and that the one controlling has added as password or you have encountered a bug somewhere which has not been reported and fixed.
If you could add your litcoin address(es) I can do some investigation.