This security update rollup resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common Vulnerabilities and Exposures (CVE): CVE-2023-36778 - Microsoft Exchange Server Remote Code Execution Vulnerability.

This security update rollup resolves vulnerabilities in Microsoft Exchange Server. To learn more about these vulnerabilities, see the following Common Vulnerabilities and Exposures (CVE): CVE-2022-21846 | Microsoft Exchange Server Remote Code Execution Vulnerability. CVE-2022-21855 | Microsoft Exchange Server Remote Code Execution Vulnerability.

An upgrade moves your PC from a previous version of Windows—such as Windows 7 or Windows 8.1—to Windows 10. An upgrade can take place on your existing device, though Microsoft recommends using Windows 10 on a new PC to take advantage of the latest features and security improvements.