If your wallet is from 2009-2010, then it can't be encrypted, because the option to encrypt the wallet was added to Bitcoin much later.
You can try using https://github.com/jackjack-jj/pywallet (pywallet) or my utility (linked below) to try dumping the private keys out of it (which can be imported into another wallet).

You can also try a tool I wrote: https://gist.github.com/SopaXorzTaker/e5256e9ecdce740f182093f72f05b8d2 (based on pywallet), which is easier to use.