1
Click Start>>Control Panel
Under "User Accounts and Family Safety" click "Add or Remove User Accounts".
Click the Guest Account. Now click "Turn off the guest account".
2
Now go to you desktop.
Right-Click>>Personalize>>Screensaver.
UNCHECK "On resume, display logon screen"
3
If you use a password to logon you will have to remove that too.
To remove password:
Click Start, then click your picture displayed on the top right of the start menu.
Click Remove Password, enter your current password, then remove password.
If you do not have a password, ignore 3.
Now restart and you should be taken to your desktop, without the logon screen.