Quartus Pro (21.4 + 22.1 + 22.2) not loading, no splash screen

Just to be sure, could you check whether the hardware and software requirement are met?

https://www.intel.com/content/www/us/en/docs/programmable/683472/22-4/system-requirements-and-prerequisites.html

It is weird that you mention that the Quartus work previously and do not work later on.

Few things that you can try out:

1) If you are running antivirus software, try to temporarily disable the antivirus software

2) Run or Install Quartus with Administrator privileges

3) Uninstall the Quartus and make sure there is no leftover file in the folder, then reinstall the Quartus

4) Check with your IT team to see if there is potential software that might be block it from opening

fyi, the current Quartus Pro released version is 22.4. I recommend to get it if you plan to reinstall.

Best Regards,

Richard Tan

p/s: If any answer from the community or Intel Support are helpful, please feel free to give best answer or rate 9/10 survey.