Cumulative updates April 2021

since i installed this update kb5001330 my laptop always crashed on start up  and freezing on tthe middle of using the machine.any help how stop these crashing and freezing.

Ever since the April update, Windows Defender definition updates will not work from windows updates and must be done manually from within windows defender itself. 

The error code that is being produced is error 0x80070643

I am still on version 1.339.179.0 for windows defender, and from searching microsoft it seems that there was a new version released with the april updates,

New version: 4.18.2104.9

Update for Microsoft Defender antimalware platform

So I don't know what is going on, why my machine is not updating with the new version properly and windows update is not doing its job. The troubleshooter says nothing is wrong. I've manually tried to download Defender and it says I have the latest version but of course the page for that shows 1.339.179.0 4.18.2103.7 as being current.

Latest security intelligence updates for Microsoft Defender Antivirus and other Microsoft antimalware - Microsoft Security Intelligence

• Platform Version: 4.18.2103.7 This incremented to 1.339.180.0 in the time I started writing this. (edited to correct for grabbing security intelligence version accidentally and not platform version, which is the issue.)

Soooo what's going on. Should I just keep updating via Defender until Windows Update sorts itself out in May in a few days? Hopefully?

Hi this is a first time i'm here and join in answer microsoft. So i have a error. my windows have problem when i update to latest version 

"2021-04 cumulative update for windows 10 version 20h2 for x64-based systems (KB5001391)"

and "servicing stack 10.0.19041.963" after update my  "explorer.exe" is error, i'm not sure but when i click to background or anything use explorer to run > it's always Crash, Not Responding , the screen goes light write then restart explorer.exe and it repeats every time I click

i was do somthing hope i can fix it but can't, i was try to run new explorer task in task manager, try to uninstall update and update again, try go in safe mode, check EFI Disk, Restart, or anything i can but problem still exist. i Think maybe problem is from servicing stack 10.0.19041.963 because i can't remove that update and never check that, also after many time my Window Update have error "we couldn't complete the updates undoing" and other error , please tell me how to fix this error

My Win-7-64 rarely gives a problem and it does not do my thinking.

FIXED!!!!!!!   A lot of troubleshooting went into this! I hope this process helps fix a lot of people's issues. 
# Issue debugging and resolution path:

Running Windows update troubleshooter: finds things wrong and make some changes

Update still fails.

# From CMD (Admin Prompt)

SFC /scannow

- Passes:

DISM /Online /Cleanup-Image /CheckHealth

- Passes:

DISM /Online /Cleanup-Image /ScanHealth

- Passes saying can be repaired. 

DISM /Online /Cleanup-Image /RestoreHealth

and 

DISM /Online /Cleanup-Image /RestoreHealth /Source:E:\Sources\install.wim

- BOTH options FAIL for the same reason!!!!

# DISM Log Errors:

2021-04-15 23:58:20, Error                 DISM   DISM Package Manager: PID=6620 TID=21340 Failed while processing command cleanup-image. - CPackageManagerCLIHandler::ExecuteCmdLine(hr:0x800f081f)

2021-04-15 23:58:20, info                  dism   dism package manager: pid=6620 tid=21340 further logs for online package and feature related operations can be found at %windir%\logs\cbs\cbs.log - cpackagemanagerclihandler::executecmdline

# CBS.Log errors:

2021-04-15 22:37:55, Error                 CSI    00000bdd (F) STATUS_OBJECT_NAME_NOT_FOUND#48580# from Windows::Rtl::SystemImplementation::DirectFileSystemProvider::SysCreateFile(flags = 0, handle = {provider=NULL, handle=0, name= ("null")}, da = (FILE_GENERIC_READ|DELETE), oa = @0xc4a887d130->OBJECT_ATTRIBUTES {s:48; rd:NULL; on:[97]'??\C:\WINDOWS\Servicing\Packages\Package_1_for_KB4601050~31bf3856ad364e35~amd64~~10.0.4330.6.cat'; a:(OBJ_CASE_INSENSITIVE)}, iosb = @0xc4a887d190, as = (null), fa = (FILE_ATTRIBUTE_NORMAL), sa = (FILE_SHARE_READ|FILE_SHA[gle=0xd0000034]

# Missing:

C:\WINDOWS\Servicing\Packages*Package_1_for_KB4601050~31bf3856ad364e35~amd64~~10.0.4330.6.cat*';

# Grab the Windows update number from the package name:

"KB4601050"

#note: this update is not part of the ISO yet downloaded from website or built with Windows media creation tool. 

# Download the package from the MS Update Catalog:

https://www.catalog.update.microsoft.com/Search.aspx?q=4601050

# Upon trying to install, you will get a message that says your system does not qualify for this package.

# note: The Issue is "KB4601050" does not install by default on Intel-based systems. This is why it is ignored by the Windows Update and DISM tool when doing a "/RestoreHealth"

# To get around the automatic installer saying "NO" do the following:

1. use 7zIp to extract the MSU file into a folder. (right-click and extract to...)

2. find the largest CAB file and rename it something manageable like "KB4601050"

3. Copy the file to a root folder on your OS drive. (c:/packages/...)

4. from a CMD (admin) prompt install the package:

      dism /Online /Add-Package /PackagePath:"PATH\TO\CAB"

#Now perform a "/RestoreHealth" 

DISM /Online /Cleanup-Image /RestoreHealth

If it completes continue to the next step.

If it fails again, verify logs and see if the same or different package is missing, and repeat the process.

# Reboot the computer.

# Perform Standard Windows update check and install. (It should complete properly now)