My dim memory says that years ago I thought I had purchased some bitcoin, but now I cannot find it.

- On a computer I acquired after the supposed purchase of bitcoin, which had all the user data copied to it from older computers, I found a "bitcoin" folder. This folder contained bitcoin-0.8.5-win32-setup.exe.

- I ran bitcoin-0.8.5-win32-setup.exe. It took a LONG time to sync, but finally finished recently. It showed no bitcoin.

- I closed the bitcoin program. In a sub-folder "walletsaved" was a wallet.dat file. I put that file in the place where the original wallet.dat file was located (found by a search of C:). I re-ran bitcoin-0.8.5-win32-setup.exe. It finished syncing in a short time. It showed no bitcoin.

- I also found info in a text file for login to mtgox.com, libertyreserve.com, and goldexpay.com. None of those logins work now.

Is there anything else I should do?