Can I get some assistance with the following error? I've had similar since .3
Deleted all but wallet.dat several times, running as admin. Win 7 x64

Hopefully you backed up your wallet. Because if you did then just take a back up and put it into the folder. Then open the wallet and it should work.
Never did. Only a few hundred sys. Hope there is another option though. Maybe a manual edit?
Oh man, ya gotta get in the habit of doing that the very first thing you do with every wallet!! I ALWAYS encrypt my wallet, shut it down, verify the wallet program did fully shut down via taskmanager (I do this step as if you copy the wallet.dat file while it is still open, you will wind up with a corrupted backup of your wallet file!).....then I create multiple backups before re-opening. Then I create a new address to TEST the newly created and LOGGED pass phrase, only then will I deposit any coins in the wallet.
If your wallet.dat file became corrupted, I don't think there is anything you can do to recover them.......I could be wrong though. Hope you get to your coins!