Once you have the serial number, follow these steps to activate the software:

Opening the , expanding the software package, and checking the "Serial Number" field .

Multisim 14.3 is now legacy. Current versions include Multisim 14.4 and NI Circuit Design Suite 14.5+. If you need modern component libraries and OS support, upgrade your license (paid, but discounted for existing users).

Key features of Multisim 14.3 include:

NI sometimes offers downgrade licenses or discounts for educational reuse. Contact NI support directly.

Respecting software licensing not only keeps you safe but also supports continued development of high-quality tools like Multisim. For further help, visit the official NI Community forums or contact Emerson/NI support directly.

Sharing or using unauthorized serial numbers constitutes software piracy, which is illegal, violates copyright laws, and carries risks including malware infection, legal liability, and denial of technical support.