Multisim | Portable

While these repacks do exist and some even function, they come with significant caveats.

If you own a valid Multisim license and simply want to carry it on an external SSD, here is the professional approach: multisim portable

Analog Devices’ LTspice is free and remarkably lightweight. While it is not “officially” portable, you can install it on a local machine, copy the entire installation folder ( C:\Program Files\LTspice ) to a USB drive, and run the executable. It will complain about missing registry keys but will simulate basic circuits 95% of the time. This is the closest legal analog to a portable Multisim. While these repacks do exist and some even