Microsoft pushed a focused Release Preview package on December 1, 2025 — KB5070311 — that updates Windows 11 on both the 24H2 and 25H2 servicing tracks (OS Builds 26100.7309 and 26200.7309) and pairs modest but widely useful UI polish with device‑gated Copilot+ improvements and an important...
accessibility
aggiornamenti preview
copilot
dark mode
dark mode polish
dark mode regression
driver issues
explorer
file explorer
file explorer fixes
interface regression
kb5070311
known issues
lsass
on-device ai
preview
release preview
software update
stabilitàlsass
ui regression
virtual workspaces
white flash
windows
windows 11
windows 11 dark mode
windows 11 preview
windows studio effects