Linux dual-boot broken, TCP/IP crippled

August’s Patch Tuesday applied a Secure Boot Advanced Targeting (SBAT) policy that bricked Linux dual-boot setups across the board. Ubuntu, Fedora, and other distributions refused to boot with a “Security Policy Violation” error — Microsoft had effectively decided that your Linux partition was a security threat. Meanwhile, TCP/IP connections suffered high CPU usage and packet loss, degrading network performance system-wide. The BitLocker recovery screen boot issue from July persisted. Profile picture changes failed with error 0x80070520 — because even the simplest features aren’t safe from Patch Tuesday.