First, see if the High-Performance power plan is visible: Right-click the battery icon, select Power Options, and see if there's a high-performance power plan in the list. If it's missing, you'll need to create a new high-performance power plan. Click the battery icon and select Power Options > Create a Power Plan, then place a check in the box next to High Performance. Name your new plan and click Next. Finally, go back to the Power Options menu and select the new plan.