What is the ruling on using design software on an unlicensed Windows system, knowing that the laws do not permit the use of the system for commercial purposes?

It is impermissible to use software unless its owner has acquired it through legitimate means, such as by purchasing it or with the permission of its owners. Otherwise, benefiting from it without such authorization is a form of infringement upon protected rights. This is the stance adopted by Islamic jurisprudence councils and reputable fatwa committees, which affirm intellectual property rights and the impermissibility of infringing upon them.