Installation Made Easy: Get MSIX Ready. Consistent and reliable installs. Every time. With InstallShield, you’ll adapt to industry changes quickly, get to market faster and deliver an engaging customer experience. The result? Productivity: up. Extra scripting/coding/rework: way down with simpler and cleaner installs, upgrades and uninstalls. Flexera InstallShield is the fastest easiest way to build Windows installers and MSIX packages and create installations directly within Microsoft Visual Studio.