I just created a new account on myetherwallet.com and installed geth on windows. I opened cmd and typed in 'cd/' and typed 'geth account list'.
In return, I got a warning saying there's no etherbase set and no accounts found as default.
Naturally, I wanted to add my existing account to the list.
So I typed 'geth account update 0x65E6ee5Eb448720E42D10542C5DE11eAaE5e384D'
Then it said
no etherbase set and no accounts found as default unlocking account 0x65E6ee5Eb448720E42D10542C5DE11eAaE5e384D | Attempt 1/3
I typed in the password I typed in on myetherwallet.com when I created my account.
In turn, it said
'Fatal : Failed to unlock account 0x65E6ee5Eb448720E42D10542C5DE11eAaE5e384D (no keyfor given address or file).
Not sure how to proceed from here... Any help?