Some users have reported difficulty running the game, or receiving poor performance on a laptop. If you are experiencing this, make sure that your PC is set to run the game on your installed graphics card, and not the integrated card.
Some systems will auto-select the integrated Intel graphics rather than the NVIDIA or AMD GPU. Open the NVIDIA control panel (or Catalyst Control Center for AMD cards) and check that your system is using the correct GPU.
If you continue to experience this issue after following the advice above, please submit a support ticket at https://gearboxsoftware.zendesk.com.