Microsoft issued patches addressing 57 security vulnerabilities, including three zero-days, and provided updates on fixing various Windows and Outlook bugs. Separately, the company is working to mitigate an incident blocking Copilot access for some European users and resolving download issues for Microsoft 365 desktop apps. MSFT closed at $478.53 yesterday, moving slightly down (-1.02% on Dec 12) amid broader tech jitters following Oracle and Broadcom guidance.