I want to send bitcoins, but cannot unlock my wallet. The rpc password located in \AppData\Roaming does not work. How can I unlock my wallet? Deleting the wallet.dat erases all my bitcoins, which I would like to keep.
If you forgot your encrypted wallet's password, there is nothing you can do.
Keep it anyway, just in case you remember it someday.
Of course, if you have a backup, you can use that one.