Forum Discussion
Occasional ContributorQuartus did not start
Occasional ContributorHi KennyT,
I spoke with our system administrator.
As a workaround, he had the bin64 directory in the Quartus installation folder excluded from Sophos's scan. That was all he could do for me. Sorry.
Without this exception, also newer versions of Quartus, such as 2026.1, won't work either.
Jens
Super ContributorHi team,
This is the root cause provided by the sophos.
Root cause: Sophos Endpoint flagged and blocked Quartus due to its behavior-based exploit mitigation engine detecting certain Quartus runtime activities as similar to exploit techniques. The block was not caused by the Quartus executable being malicious or by its file signature/hash, but by Sophos monitoring low-level runtime behavior that matched exploit-like patterns. The issue was mitigated by adding the appropriate process, file/folder, and exploit-mitigation exclusions.
https://support.sophos.com/support/s/article/KBA-000007176?language=en_US
I think we shall close the case if there are no further queries.
- Jens
Hello KennyT,
Unfortunately, Quartus 26.1 still won't start for us when Sophos is enabled.
So the problem persists. Please see below Sophos version that is installed on my system.
Jens
- KennyT_altera
Hi Jens,
Have you apply the workaround provided by Sophos? Do you mean after apply the workaround, it is still not working?
Thanks,
Best regards,
Kenny Tan
- Jens
Hi KennyT,
Okay, I just found the instructions at the link above. We'll look into it. But I think our administration has already done something like that. Thanks.
Jens
- KennyT_altera
Sure, do let us know the status.
