The pre-release version of Windows 10 allows users to decide how fast they want new builds to test the operating system, by simply choosing “fast” or “slow” option.
Those who opt for the “fast” ring of update, get the new build faster, but the code is less stable. The “slow” ring also provides access to the latest builds, but users have to wait a little longer.
The issue is that tech enthusiasts like to get their hands on the latest and greatest as soon as it comes out, and later on, we all want the most stable code.
Now the question is: if you installed a new build from the fast channel, do you need to install the updated version of the Windows 10 preview available in the slow channel? No, you don’t have to install the slow version of Windows 10, because it’s the same version you already have installed. But you’ll need to install the latest updates released from Windows Update to bring your system to a more stable code.
For example, for Windows 10 build 9879, Microsoft first released the update KB3019269 to address bugs in the fast version of the operating system. Follow the update, the company made available build 9879 to the slow ring and also release the ISO files of the new build.
If you want to go back to the slow ring of updates, just go to Preview builds in PC settings and choose the new configuration. Then the next time Microsoft releases a new version of Windows 10 Technical Preview or Consumer Preview, you’ll only get the more stable version.
Keep in mind that the fast ring are for those willing to test an operating system that is more buggy, but it’ll get you the new features faster. The slow ring is where you want to be, you’ll get the new features in Windows 10, the code is less buggy and users will experience less crashes.