Quartus lite download error (Internet connection cannot be established)

I suspect there might be an issue with your laptop or PC's security settings. Please check with IT to see if the system is blocking the download.

Alternatively, you can manually install the software by downloading the .tar file (Completed Download) or the individual files.

https://www.intel.com/content/www/us/en/software-kit/862357/intel-quartus-prime-pro-edition-design-software-version-25-1-1-for-windows.html

https://www.intel.com/content/www/us/en/docs/programmable/683472/25-1/installing-from-tar-files.html

Regards,

Richard Tan