Specifically tailored for Windows 8.1, StartIsBack+ is known for being extremely lightweight and stable. It focuses on performance and integrates perfectly with the original Windows 8.1 codebase. How to Install and Configure a Windows 11 Look

Formerly known as Classic Shell, Open-Shell is a highly popular free alternative. While its default styles are more traditional (Windows 7/XP), you can download custom Windows 11 skins from community sites like DeviantArt to mimic the modern look.

Start11 is the most advanced tool for this purpose. While originally designed for Windows 10 and 11, its predecessors like Start8 were built specifically for Windows 8/8.1. Start11 allows you to choose a "Windows 11 style" layout, giving you the centered taskbar and rounded menu design even on older systems.

While there is no official "Windows 11 Start Menu" download from Microsoft for Windows 8.1, you can achieve this modern look using high-quality third-party software. Windows 8.1 famously replaced the Start Menu with a full-screen "Start Screen," but you can restore a centered, Windows 11-style menu with the right tools. Top Windows 11 Start Menu Replacements for Windows 8.1

If you want the centered icons and minimalist aesthetics of Windows 11 on your Windows 8.1 machine, these applications are your best options:

To get the closest possible experience to Windows 11 on your Windows 8.1 desktop, follow these general steps: Classic Shell - Start menu and other Windows enhancements