I am surprised Sena has not already fixed this, because it would appear their software will not install on any computer.
First, 64-bit versions of Windows 10 and 8 include a “driver signature enforcement” feature. They’ll only load drivers that have been signed by Microsoft. To install less-than-official drivers or old unsigned drivers, you’ll need to disable driver signature enforcement.
Keep in mind: Microsoft isn’t just trying to make your life harder here. Driver signing enforcement ensures that only drivers that have been sent to Microsoft for signing will load into the Windows kernel. This prevents malware from burrowing its way into the Windows kernel.
Disable driver signing and you’ll be able to install drivers that weren’t officially signed. Be sure you know what you’re doing! You should only install drivers you trust.
Uninstall the Sena Software Bluetooth Device Manager and the Windows Driver Package - Cambridge Silicon Radio Ltd programs from Control Panel - Programs and Features.
Next, disable driver signature enforcement and install drivers that are not digitally signed, use the following steps:
1. Click the Start Start menu and select Settings.
2. Click Update and Security.
3. Click on Recovery.
4. Click Restart now under Advanced Startup.
5. Click Troubleshoot.
6. Click Advanced options.
7. Click Startup Settings.
8. Click on Restart.
9. On the Startup Settings screen press 7 or F7 to disable driver signature enforcement.
Your computer will restart and you will be able to install non-digitally signed drivers. If you restart your computer again the driver signature enforcement will be re-enabled.
Once this is done, you can then install the Sena Software and Drivers and the SMH10 will then be recognized allowing for the firmware update.