Windows 10 July Patch Tuesday updates trigger start-up issues
It seems like the list of bugs for the July 2019 Patch Tuesday updates has not ended yet. Microsoft recently acknowledged that a new bug is affecting the latest cumulative updates.
Microsoft warns that you may experience device startup issues on devices that use PXE from a SCCM or WDS server. The tech giant confirmed that a permanent fix would be available in the upcoming release.
Microsoft confirmed that this issue affects various versions of Windows 10 including Windows Server 2008 SP2, Windows Server 2008 R2 SP1, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server v1803, Windows Server 2019, Windows Server v1809, Windows Server v1903.
Microsoft describes the bug in the following manner:
Devices that start up using Preboot Execution Environment (PXE) images from Windows Deployment Services (WDS) or System Center Configuration Manager (SCCM) may fail to start with the error “Status: 0xc0000001, Info: A required device isn’t connected or can’t be accessed” after installing this update on a WDS server.
Can I fix this issue?
Fortunately, Microsoft suggested a workaround for this issues. Follow these steps to get rid of the issue on a SCCM server:
- You should check if Variable Window Extension is enabled or not.
- Secondly, you need to modify some values. Change the TFTP value to 4096 and modify the window size of TFTP to 1.
Microsoft is currently investigating the issue and promised that a fix would be available soon. You can check out the support article for more details.
The support article reads:
Try the default values for TFTP block size and TFTP window size first but depending on your environment and overall settings, you may need to adjust them for your setup. You can also try the Enable a PXE responder without Windows Deployment Service setting. For more information on this setting, see Install and configure distribution points in Configuration Manager.
As you can see, Windows 10 Patch Tuesday update KB4503327 is plagued by various issues. At the time of writing this article, Microsoft already acknowledged a total of 7 issues. The number is expected to increase in the next few days.
Therefore, it is highly recommended that you should back up your system before installing the recent patches. However, if you already installed the updates, you can roll back to a previous version to avoid any potential issues.
You may also want to check out these guides to learn how you can fix boot up issues:
- 9 ways to fix slow boot time in Windows 10 on SSD
- PC won’t boot after BIOS update? Here’s how to fix this [QUICK WAYS]
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