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For more information about the various types of Windows updates, such as critical, security, driver, service packs, etc., please see the following article.
This non-security update includes quality improvements. Key changes include:
You may also receive an "Invalid procedure call” error.
If you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.
Windows Update Improvements
Microsoft has released an update directly to the Windows Update client to improve reliability. Any device running Windows 10 configured to receive updates automatically from Windows Update, including Enterprise and Pro editions, will be offered the latest Windows 10 feature update based on device compatibility and Windows Update for Business deferral policy. This doesn't apply to long-term servicing editions.
| Symptom | Workaround |
| Certain operations, such as rename, that you perform on files or folders that are on a Cluster Shared Volume (CSV) may fail with the error, “STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)”. This occurs when you perform the operation on a CSV owner node from a process that doesn’t have administrator privilege. |
Do one of the following:
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Before installing this update
Microsoft strongly recommends that you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing the LCU and applying Microsoft security fixes. For more information, see Servicing stack updates.
If you are using Windows Update, the latest SSU (KB4509090) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog.
Install this update
| Release Channel | Available | Next Step |
| Windows Update and Microsoft Update | Yes | Go to Settings > Update & Security > Windows Update and select Check for updates. |
| Microsoft Update Catalog | Yes | To get the standalone package for this update, go to the Microsoft Update Catalog website. |
| Windows Server Update Services (WSUS) | Yes |
This update will automatically synchronize with WSUS if you configure Products and Classifications as follows: Product: Windows 10 Classification: Update |
File information
For a list of the files that are provided in this update, download the file information for cumulative update 4517276.
Keywords: windows 10 rtm