If you're unable to obtain a free activation code, consider the following alternatives:
For basic circuit simulation, Multisim Live is a free, web-based tool that requires no installation or activation code. ni multisim 14.1 free activation code
— If you are a student or educator, check with your institution — many universities have site licenses or provide access through software portals like OnTheHub or Azure Dev Tools. If you're unable to obtain a free activation