OK. Something is messed with your machine.
To start fresh, more info needed.

What version of OS X (Apple menu-> About this Mac) and LW are you using?

For your other concern about LW's auto login, try this:
To disable LW automatic login, go to Apple menu-> System Preferences, then select the System: Accounts part. Select the Login Items area, and if you see LW there, select it and use the (-)button to remove it.

btw--I was talking about you logging in to your Mac's user account, not some other account.