How to upgrade to Windows 11 for free in 2026?

Let's learn to how to upgrade to Windows 11. WinPE is a minimal operating system from Microsoft designed specifically for installing, deploying, and repairing Windows . Unlike the standard Windows installer that runs inside your existing Windows 10, a custom WinPE environment boots directly from a USB drive, bypasses your current operating system entirely, and—most importantly—allows you to load the Windows 11 installer without triggering the hardware compatibility checks that block your upgrade.

The reason this method works so reliably is that WinPE boots before Windows loads. When you boot from a standard Windows 11 USB installer, the setup program runs hardware checks based on the recovery environment included on that USB. However, when you build your own custom WinPE environment, you control exactly what components are included and how the installation is launched .

According to official Microsoft documentation, WinPE can be customized by adding packages, drivers, and—crucially—by modifying the startup scripts that control how Windows Setup behaves . This level of control is what allows you to bypass the hardware restrictions that normally block installation on your older PC.

Now that you understand how to upgrade to Windows 11 using a custom WinPE boot environment, you can proceed with confidence. This method is used by IT professionals to deploy Windows 11 across fleets of computers with mixed hardware, and it is a completely free, Microsoft-tool-only approach that works reliably on older PCs.