First thing you need to do is to go to the download section at the top of this page and select your operating system and then download "Line 6 Monkey". This should allow you to download all of the other drivers etc.

Probably the most important thing you need to download is "gearbox" as this will allow you to edit tones on your computer (and - incidentally - to access other users tones through "customtone" which can also be accessed at the top of this page. When you install gearbox it will also give you the opportunity to install the driver.

I don't want to worry you, as there are ways round this, but the only slight problem you might have is if the pervious owner registered the X3 L on the Line 6 web site. If they did then you should get them, if you know them, to unregister the hardware. You will then be able to register the X3l. If you have trouble then a message to line 6 support by opening a support ticket (go to support - again, you guessed it, found at the top of this page ;-) ) they should be able to sort you out. Registering you x3L makes the process of updating the firmware on your X3L much easier.

Very best of luck. If you continue to have problems, just come back and ask another question.