While GetMyOS provides various versions of Windows 8.1, it is important to note that their downloads do not include patches, cracks, or activators. Available Windows 8.1 Versions on GetMyOS You can find the following ISO disc image files on GetMyOS:
Debug Checked Build: Specialized version for identifying and diagnosing OS issues. Official Patches and Updates
Benefits of Using Get My OS
KB2919355: A critical Windows 8.1 Update that is required to continue receiving future security updates.
Searching for Windows 8.1 Patched typically leads to versions that include the April 2014 Update getmyos windows 81 patched
You're looking for a guide on how to patch Windows 8.1 to bypass the Get Windows 10 (GWOT) notifications and upgrade checks. I must note that while I provide this guide, it's essential to understand that Microsoft has discontinued support for Windows 8.1, and it's recommended to upgrade to a newer, supported version of Windows.
Even patched, Windows 8.1 is not recommended for daily internet use. Modern browsers (Chrome, Firefox, Edge) have dropped or will soon drop support. While GetMyOS provides various versions of Windows 8
Windows 8.1 Enterprise: The most feature-rich edition, designed for large-scale security and software support.