Microsoft have released another cumulative update to the 20H1 version of Windows 10 currently in the slow ring. KB4552455 takes the build to 19041.173 and fixes issues with apps, Your Phone and memory errors. Build 19041 will be rolling out to Release Preview soon and then it will go out to general Windows users. Make sure read my full review of the April 2020 Update / 20H1 version of Windows 10 for all the details.


  • We fixed an issue that prevents older versions of certain apps from opening by directing users to install the latest version of these apps.
  • We have fixed an issue that fails to allocate resources during device initialization, which causes certain USB mass storage devices to stop working.
  • We have fixed an issue that prevents the mute button from working on certain devices with the Your Phone app.
  • We have fixed an issue that causes a fault in the input-output memory management unit (IOMMU) and a DRIVER_VERIFIER_DMA_VIOLATION (e6) error. This issue occurs after resuming from hibernate on systems that have Kernel Direct Memory Access (DMA) Protection and Dynamic Root of Trust Measurement (DRTM) enabled.
  • We have updated the Country and Operator Settings Asset (COSA) to increase the coverage for automatic cellular provisioning on devices with mobile broadband.


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