Proteus is a popular electronic design automation (EDA) software used for designing and simulating electronic circuits. The software is widely used by engineers, students, and hobbyists for designing and testing electronic circuits. Proteus 8.1 Portable 64 Bit is a portable version of the software that can be run on a 64-bit operating system without the need for installation. In this paper, we will discuss the features and capabilities of Proteus 8.1 Portable 64 Bit.