If you are trying to update to the Windows 10 May 2019 Feature Update (Windows 10, version 1903), you may encounter an update compatibility hold and receive the message, "Intel Rapid Storage Technology (Intel RST): The inbox storage driver iastora.sys doesn’t work on these systems and causes stability problems on Windows. Check with your software/driver provider for an updated version that runs on this version of Windows."
Intel and Microsoft have found incompatibility issues with certain versions of the Intel® Rapid Storage Technology (Intel® RST) drivers and the Windows 10 May 2019 Update. If your device has an Intel® RST driver version between 184.108.40.2062 and 220.127.116.113 installed, it cannot install the May 2019 Update.
Versions 18.104.22.1684 or later are compatible, and a device that has these drivers installed can install the Windows 10 May 2019 Update. For affected devices, the recommended version is 22.214.171.1240.
We are working on a resolution and estimate a solution will be available in late August.
To mitigate this issue before the resolution is available, you will need to update the Intel® RST drivers for your device to version 126.96.36.1994 or a later. Check with your device manufacturer (OEM) to see if an updated driver is available and install it. You can also download the latest Intel® RST drivers directly from Intel at Intel® Rapid Storage Technology (Intel® RST) User Interface and Driver. Once your drivers are updated, you can restart the installation process for the May 2019 Update.