Qualcomm will start shipping new PCs with the Snapdragon X2 chipset by April 2026. This coincides with Microsoft testing Windows 11 26H1, which is designed for these new CPUs and will only be available on new Arm64 PCs. Windows 11 26H1 is not an update for existing PCs and will not be accessible to Intel or AMD users. Since November 2025, Windows Insiders have been testing this version, which is based on a platform release codenamed ‘Bromine’ and includes support for Snapdragon X2 Plus, Elite, and Extreme models. Microsoft has stated that 26H1 is aimed at supporting new processors and may involve changes to power states and scheduling. The build number for this version is 28000, and while there are minor user interface improvements, significant changes are expected in the upcoming Windows 11 26H2 release, anticipated for October 2026.