Windows 11's global desktop market share declined from 55.18% in October 2025 to 50.73% by December 2025. The operating system faced technical issues, including a problematic Patch Tuesday that affected users' ability to run applications and shut down devices. Microsoft's decision to allow the FBI access to BitLocker encryption keys has eroded user trust. Additionally, increasing advertisements and a push towards AI integration have led to dissatisfaction among users. Complaints about Windows 11 have spread from niche forums to mainstream channels, with critics noting a disconnect between new hardware capabilities and the operating system's performance.