The UK Competition and Markets Authority (CMA) is seeking comments on Microsoft's business software ecosystem, with responses from various stakeholders, including the Browser Choice Alliance (BCA). The BCA expresses concerns that Microsoft uses its dominance in operating systems and productivity software to promote its own browser, hindering competition. They argue that Microsoft's distribution strategies and design decisions limit user choice and innovation. The transition from Windows 10 to Windows 11 is highlighted as a critical factor, as it allows Microsoft to influence browser choices during upgrades. The BCA links browser competition to the adoption of AI tools, warning that competitive issues in the browser space could affect the AI domain if Microsoft employs similar tactics. They advocate for independent selection of AI tools to prevent distortion of competition and user choice. The BCA concludes that Microsoft's practices negatively impact user experience and productivity for businesses in the UK, damaging innovative browser developers.