Quartus 15.1 Download Fix Jun 2026

To verify your Quartus 15.1 download and installation work, create a minimal project:

The main Quartus installer (~3 GB) does NOT include device support files. You must also download: quartus 15.1 download

: Supports the broadest range of latest device families and requires a paid subscription license. To verify your Quartus 15

: In some cases, obtaining legacy software like 15.1 requires a valid Non-Disclosure Agreement (NDA) between your company and Intel/Altera. Edition Differences (Version 15.1) Edition Differences (Version 15

Intel does not keep old versions on the main download page. Scroll down to find "Download Archive" or "Previous Versions" . Click that link.

Windows 10 and 11 require digitally signed drivers. The drivers packaged with Quartus 15.1 are from 2014. Consequently, installing the software on a modern PC requires disabling Secure Boot or forcing Windows into "Test Mode." This friction creates a cottage industry of YouTube tutorials showing how to force the legacy jtagserver.exe to run while Windows Defender screams in protest.