KB4457128 installs twice and breaks File Explorer

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4 min. read

Updated on April 23, 2020

by Milan Stanojevic

updated on April 23, 2020

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Patch Tuesday on 11 September was just not meant to be a safe day for Windows 10 users. KB4457128, version OS Build 17134.285, has come with two major issues: duplicated installation and File Explorer crash.

Make sure to read this post before you install this security update. If you already updated your system, definitely check out below find out all the details of issues and fixes that were reported so far.

KB4457128 improvements and fixes

First, we are going to have a look at what this update includes as key changes. No new operating system features are being introduced since this update only brings quality improvements. Microsoft mentions the following:

provides protection against a Spectre Variant 2 vulnerability (CVE-2017-5715) for ARM64 devices.
addresses an issue that causes excessive CPU usage from the Program Compatibility Assistant (PCA) service.

KB4457128 brings security updates to:

Internet Explorer
Microsoft Edge
Microsoft scripting engine
Microsoft Graphics Component
Windows media
Windows Shell
Windows Hyper-V
Windows datacenter networking
Windows virtualization and kernel
Windows Linux
Windows kernel
Microsoft JET Database Engine
Windows MSXML, and Windows Server.

Since this is a cumulative update, only the new fixes in this package will be downloaded and installed on your device, if you installed earlier updates.

KB4457128 issues

Duplicated installation of KB4457128

Early on today, in the Microsoft Answers community there was an issue reported regarding the double installation of KB4457128. Replies came shortly to confirm it is not a single case, but many observed this problem in the Windows Update History.

Apparently, there is no critical harm yet reported on any computers whatsoever, but a big sign of concern from a few Insiders:

The only issues so far coming from Release are Apps window sizes revert to default on the upgrade and still turns on “Show me suggested content in Settings” after turning this to off in Release. Most of the other issues have cleared up. This build shows promise. Will clean install this one in laptop.

Looks like Microsoft could have prevented this, but omitted to test these Cumulative Updates with the Insiders. Now the whole world has to deal with this, as one of the Insiders claims on the Microsoft Answers community:

This is what happens with MS not giving these CU to Insiders on Just Fixes as they once did prior to releasing. This could have been prevented. Now the whole world has to deal with this.

Other users have confirmed the double install, although observing that computer is running great.

You can also make sure to check your Event Viewer for any warnings or critical issues since signing in after this update. Also, check Security and Maintenance log for any problems.

One of the Microsoft Agents followed this thread and guaranteed that the engineering team knows about the issues now. It might be just a matter of time for the new patch to be released and fix this. Keep an eye on our news category to be informed.

File Explorer freezes after installing KB4457128

We have noticed that File Explorer was running quite slow today and scanning the forums appears that we are not the only one to see some problems. If you also happen to have these issues, do not hesitate to leave us a comment in the box below.

Try to organize your files in the File Explorer, and check its behavior even with few files in a folder. Pay attention to the speed it operates simple commands and if at any time appears to be frozen.

A few users have checked if programs that take lots of CPU/memory resources were run when these problems occurred. Also, reassured that no file transfer or other operations were actioned at that time.

How to fix File Explorer issues after installing the update

We recommend running a SFC/scannow to check and repair system files. Also, perform a refresh or reset for Windows. If you reset your system, you have the option to Keep personal files in the setup process.

Read also:

There are various issues after Windows Updates in the previous builds, and we covered all of them with effective solutions. Let us know about your specific issue in the comments below.