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April 2021 Cumulative Updates available for Windows 7 SP1 and 8.1

New Monthly Rollup and Security-only updates available for older Windows 8.1 and Windows 7 users who signup for Extended Security Updates (ESU) Here what's new

Along with April 2021 Patch, Tuesday updates KB5001330, KB5001337, KB5001342 for all supported windows 10 devices, Microsoft also released updates KB5001382, KB5001393 for older devices as well. As you know Windows 7 reached the end of support on 14th January 2020 these updates only applicable for Windows 8.1 and Server 2012. And the Extended Security Updates KB5001335, KB5001392 are available for Windows 7, Windows Server 2008 R2 SP1, and Windows Server 2008 SP2 who have paid for Extended Security Updates (ESU).

For Windows 8.1

Both KB5001382 (Monthly Rollup) and KB5001393 (Security-only update) bring Security updates to Windows Input and Composition, Windows Fundamentals, Windows Hybrid Cloud Networking, Windows Kernel, and Windows Media.

Addresses a time zone change for Volgograd, Russia from UTC+4 to UTC+3 Moscow Standard Time (MSK).

Addresses a time zone change for The Republic of South Sudan from UTC+3 to UTC+2 Juba.

In addition, Monthly Rollup KB5001382 includes fixes for recently discovered security bugs related to RemoteFX vGPU.

Addresses an issue that prevents you from specifying up to 255 columns when you use the Jet Text installable indexed sequential access method (IISAM) format.

Known issue:

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)”.

Windows 7 SP1

Important Note:

Starting with today 14 January 2020  Windows 7 reached the end of life, means devices running windows 7 sp1 no longer receive any other security patches. Microsoft recommend upgrade windows 10 for latest security features and protection against milicious software.

Windows 7 end of life warning

Windows 7 users who extended sign up for Extended Security Updates (ESU) receive KB5001335 Monthly Rollup and KB5001392 Security-only update brings Security updates to Security updates to Windows Apps, Windows Hybrid Cloud Networking, and Windows Media.

  • Addresses a time zone change for Volgograd, Russia from UTC+4 to UTC+3 Moscow Standard Time (MSK).

  • Addresses a time zone change for The Republic of South Sudan from UTC+3 to UTC+2 Juba. For more information about this change, see KB 4601275.

In addition Windows 7 Monthly Rollup KB5001335

  • Addresses an issue that prevents you from specifying up to 255 columns when you use the Jet Text installable indexed sequential access method (IISAM) format.

  • Addresses an issue if you monitor for these events, Windows Backup will not report a successful Event ID 14 or backup finished Event ID 4 after you apply update KB4561643 or KB4556843.
  • Addresses an issue with security vulnerabilities identified by a security researcher

Because of these security vulnerabilities, this and all future Windows updates will no longer contain the RemoteFX vGPU feature. For more information about the vulnerability and its removal, see CVE-2020-1036 and KB4570006. Secure vGPU alternatives are available using Discrete Device Assignment (DDA) in Windows Server LTSC releases (Windows Server 2016 and Windows Server 2019) and Windows Server SAC releases (Windows Server, version 1803 and later versions).

Known issues: 

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)”.

After installing this update and restarting your device, you might receive the error, “Failure to configure Windows updates. Reverting Changes. Do not turn off your computer,” and the update might show as Failed in Update History.

The company says this issue expected in the following circumstances:

  • If you are installing this update on a device that is running an edition that is not supported for ESU. For a complete list of which editions are supported, see KB4497181.
  • If you do not have an ESU MAK add-on key installed and activated.

If you have purchased an ESU key and have encountered this issue, please verify you have applied all prerequisites and that your key is activated.

Windows 7 SP1 and Windows Server 2008 R2 SP Download links

Also Microsoft mention these updates are not available via Windows Update this can only be installed with a manual download. You can download these updates from the Microsoft Update Catalog website using the links below.

You must install the updates listed below and restart your device before installing the latest Rollup. Installing these updates improves the reliability of the update process and mitigates potential issues while installing the Rollup and applying Microsoft security fixes.

  1. The March 12, 2019 servicing stack update (SSU) (KB4490628).  To get the standalone package for this SSU, search for it in the Microsoft Update Catalog. This update is required to install updates that are only SHA-2 signed.
  2. The latest SHA-2 update (KB4474419) released September 10, 2019. If you are using Windows Update, the latest SHA-2 update will be offered to you automatically. This update is required to install updates that are only SHA-2 signed. For more information on SHA-2 updates, see 2019 SHA-2 Code Signing Support requirement for Windows and WSUS.
  3. The January 14, 2020 SSU (KB4536952) or later. To get the standalone package for this SSU, search for it in the Microsoft Update Catalog.
  4. The Extended Security Updates (ESU) Licensing Preparation Package (KB4538483) released February 11, 2020. The ESU licensing preparation package will be offered to you from WSUS. To get the standalone package for ESU licensing preparation package, search for it in the Microsoft Update Catalog.

After installing the items above, Microsoft strongly recommends that you install the latest SSU (KB4537829). If you are using Windows Update, the latest SSU will be offered to you automatically if you are an ESU customer.

Windows 8.1 and Windows Server 2012 R2

  • KB5001382 — 2021-04 Security Monthly Quality Rollup for Windows 8.1
  • KB5001393 — 2021-04 Security Only Quality Update for Windows 8.1

Also, New cumulative updates available for the latest Windows 10 20H2, read the changelog from here.

Also read:

Source Microsoft Microsoft
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