Screen resolution needs to be at least 1024 in vertical direction to see the LMS Test.Lab Navigation toolbars.
You can use CTRL-PAGEUP and CTRL-PAGEDOWN to move between tabs when you cannot see them:
Did your screen resolution change recently?
You may want to check the screen resolution on the new laptop.
Right click in the background and select "Screen resolution".
Choose any resolution where the last number is bigger than 1024:
Press Apply when finished.