Windows 10 version 1703 is now out of service and will not provide any future security or reliability updates. Creators Update is also called Creators Update.
When a Windows version is out of operation, Microsoft will no longer patch bugs in the software or release security updates to address new vulnerabilities.
By 8 October 2019 users running Windows 10 1703 home, enterprise and education versions will upgrade to Windows 10 1903 to continue receiving updates.
“To continue to receive quality updates beyond these dates, you will need to update those devices to the current version of Windows 10, version 1903.”
In extremely rare cases, Microsoft may launch a security update even for versions of Windows which are not available on its services if it believes a vulnerability is serious enough and could have a major impact on the Windows ecosystem.
For example, BlueKeep (CVE-2019-0708), a crucial wormable Remote Desktop vulnerability, was identified in May and Microsoft decided to upgrade protection for Windows XP and Windows Server 2003.
It is highly recommended that all users update to Windows 10 1903 to stay secure, as new vulnerabilities come up each month that can be used to install malware or compromising a device through phishing camps, malicious websites, and local attackers.
The next update of the Windows 10 version 1803 is the 12 November 2019 consumer version, with the business and school versions going to EoS in November 2020.