Use a VM with Windows 7 or use bcdedit /set testsigning on (temporarily).
If you meant something else (e.g., a specific device model like “Coolsand CM2” is a phone name), please provide more details and I’ll refine the content. coolsand usb driver cm2
(a common boot key for Coolsand devices) while connecting the USB cable to the computer. Use a VM with Windows 7 or use