There are many reasons why Roku device is causing some problems. A software update with a bug might cause the Roku to freeze and running slowly. The best way to ensure smooth running of Roku is restart the Roku device. One way to restart the Roku device with Roku remote is to select the setting from the home screen. Then, scroll down to select the System option. Click on the System restart option and your Roku device will restart. If you're still facing issues with your Roku device, then you may contact Roku support number to get your issues fixed with Roku com link and other issues.