CoolStar is a developer known for creating software and drivers, particularly for audio solutions. The SST (Sound System Technologies) audio driver is one of their products, aimed at enhancing or enabling audio functionalities on computers, especially in scenarios where standard drivers might not work properly.
Because these are community-developed drivers, they are signed with a test certificate. Windows will block them by default unless you enable Test Mode.
If your system crashes immediately after installing the driver, you likely installed a version meant for a different CPU generation. Boot Windows into .
Standard Windows installations do not include drivers for the custom audio hardware found in Chrome OS devices. The developer known as created this driver to bridge that gap, allowing the speakers, headphones, and microphone to function correctly on Windows 10 (and in some cases, Windows 11).