Can't download Quartus II 13.1 for Windows.

Hi Chihsien,

We are so sorry that there's some system issues at the backend causing the installation files missing from the download page before this and we have fixed the issue. Thanks for letting us know ^-^

Good News ! You can now find the Quartus II 13.1sp installation package from our official download page and is available for downloading ^-^

https://www.intel.com/content/www/us/en/software-kit/666220/intel-quartus-ii-web-edition-design-software-version-13-1-for-linux.html

Beyond this, is there any further support that needed from our end ?

Best Regards

Hubert