New Contributor
Regular ContributorHi,
I would recommend you to use the Quaruts Programmer 20.4 which is the latest version with the latest driver or you can disable the driver signature as the step below. The reason that you will failed to install is because the driver signature of the Quartus 20.1 has already expired.
1 - Go to windows 10 settings and search for "advanced startup options"
2 - Under Advanced startup, hit "Restart now"
3 - After a moment, you'll get a "choose an option" screen - choose "Troubleshoot", then "Advanced options", then "Startup Settings"
4 - You'll get a screen telling you what you will be able to change and a single "Restart" button - press it.
5 - If your boot drive is BitLocker encrypted, you'll need to enter the recovery key (press return, enter the key in the text box then hit return again - it took me three goes to realize I had to hit return before I could enter they key !)
6 - You'll be given a menu of options, number 7 disables driver signature enforcement
7 - When the PC restarts, use Device manager to update the drivers - this time you'll get a warning about the signature, but they install fine.
8 - When you've finished, restart normally to re-enable signature enforcement
