Microsoft is changing Windows to restrict security software from operating at the kernel level to reduce vulnerabilities. This decision follows a flawed update from CrowdStrike that crashed over 8.5 million Windows machines. Microsoft is collaborating with security firms like CrowdStrike, Bitdefender, ESET, and Trend Micro to create a new security platform, emphasizing a cooperative approach rather than dictating terms. The transition will start with a private preview for security companies, initially affecting antivirus and endpoint detection software, with plans to include other applications later. Microsoft is also introducing a Quick Machine Recovery feature to restore systems that fail to boot and replacing the "Blue Screen of Death" with a black screen as part of its updates.