Here is everything you need to know about getting NI Multisim 14.3 running correctly and why official licensing is the better choice for your engineering projects. Why a Genuine Serial Number Matters
Ensure your serial number is for version 14.x. A serial number for version 12.0 will not work for 14.3. ni multisim 143 serial number better
A web-based version of Multisim that is free for basic use. Here is everything you need to know about