The most common tamper point is sources\install.wim. Attackers can embed cryptominers, keyloggers, or backdoor RATs (Remote Access Trojans) into the pre-installed system files. Because the ISO is niche, antivirus definitions may not flag it immediately.
If you have a legitimate use case and possess the necessary licensing (a valid Windows 7 product key for Professional or Ultimate), here is how to deploy the Win7-sp1-32-64-en-faxcool Iso. Win7-sp1-32-64-en-faxcool Iso
Warning: Only install this ISO on an air-gapped or well-protected network. Windows 7 without ongoing security updates is highly vulnerable. For legitimate Windows 7 needs:
Windows 7 SP1 does not include the 2021 root certificate updates. If the “Faxcool” ISO was last modified in 2016, you will get SSL errors in any modern browser immediately after installation. You will need to manually install the rootsupd.exe patch. If the image has already been installed: