Searching for a "patched" Windows RT 8.1 ISO usually refers to community-made versions that bypass the original hardware restrictions (allowing installation on non-Surface devices) or include the Jailbreak and Update 3 (which adds a Start menu) pre-installed.
Update 3 (Start Menu): Search for KB3033055. This is the official "patch" that makes RT 8.1 look like Windows 10. windows rt 81 iso patched
Because Microsoft officially declared Windows RT dead in 2023 (extended support ended), the community has moved to specialized forums: Searching for a "patched" Windows RT 8
By 2025, the official Windows Store for RT devices is largely defunct. Many services no longer connect. This means an unpatched Windows RT 8.1 device is effectively unusable for modern web browsing or media playback. windows rt 81 iso patched