Recent versions of Windows 10 have an issue with WinPcap. You may need additional storage for your operating system and device images. You may need to enable this via your computer's BIOS.ġ GB available space (Windows Installation is < 200 MB). The following are the minimum requirements for a Windows GNS3 environment: Item For 32-bit CPU or older operating systems, please read this documentation. Note: The 32 bit version is not discussed in this guide. GNS3 supports the following Windows operating systems: Install prerequisite and optional software.This document explains how to install GNS3 using a Windows environment.