Should I remove Outer UI of a website when displaying a wizard?

The layout for this project has a thin tool bar on the left that's fixed (60px width) and one at the top that's also fixed (60px height).

My question is this:

I have a wizard that guides a user through a complex form, so should I removed the 2 tool bars and make the wizard fullscreen, or should I keep them there so that a user can easily navigate to other parts of the site in a familiar way?

Note that I would also include a cancel button for either scenario.