To check which version of the Thunderbolt™ software, NVM firmware, and drivers you are running, do the following: Click Start. Type Thunderbolt and click on the search result. In the system tray, right-click the Thunderbolt™ icon. Click Settings > Details. Review the versions of the software package, NVM firmware, PD firmware, and drivers. If you are not running the latest versions, navigate to your system manufacturer’s website and download the latest versions.