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Windows update Fixed a problem when the PC did not start after applying KB5021233

Tenorshare Co., Ltd.
[Windows update] Fixed a problem when the PC did not start after applying KB5021233
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After applying the security update KB5021233 for Windows 10 version 22H2 / 21H2 / 21H1 on December 14, 2022, there have been multiple bug reports that the 0xc000021a blue screen error (BSoD) occurred and the PC did not start. I’m here. In this article, we will introduce three countermeasures when the PC stops booting due to an update (Revert to the previous version, Boot into safe mode and execute commands, Repair with 4DDiG Windows Boot Genius).
Software development company Tenorshare develops and provides products that solve problems related to personal computers. “4DDiG Windows Boot Genius” latest version 1.0.5 was announced on Saturday, November 19th. Automatically fix Windows issues such as blue/black screens, system crashes, etc. in minutes. You can boot a PC that has become unbootable due to an update failure.
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table of contents:
About update KB5021233
Problems after updating Windows 10 to the latest version
Go back to Windows 10 or earlier
boot into safe mode and run command
Repair/boot with 4DDiG Windows Boot Genius

1. About update KB5021233
・Release date: 2022/12/13
・Version: OS Build 19042.2364, 19043.2364, 19044.2364, 19045.2364 All editions of Windows 10, version 21H1 will reach end of service on December 13, 2022. KB5021233 is a cumulative update containing security updates for Windows 10 version 21H2/21H1. Applying this update fixes the vulnerability.
2. Problems after updating Windows 10 to the latest version
Problems that occurred after upgrading to Windows 10:
– Keyboard and touchpad not working
・OS (Win10) does not start
・The screen flickers.
・Original software does not work
・Failed to restore to the original OS and stopped booting
・Recovery program became unusable
・Cannot connect to the Internet
– Can’t use online banking
3. Go back to Windows 10 or earlier version
After updating Windows 10 to the latest version, if you encounter any problems, you may be able to fix the problems by reverting to the previous version first.
4. Boot into safe mode and run command
If you encounter problems due to Windows update failure, you can try booting Windows 10 in safe mode to fix your computer problems. 5. Repair/boot with 4DDiG Windows Boot Genius
4DDiG Windows Boot Genius is software specially developed by software development company Tenorshare to solve the problem that personal computers and various hard disks cannot be used normally. 4DDiG Windows Boot Genius can help you boot your unbootable PC when there is a problem with Windows update.
Now, let me introduce how to use 4DDiG Windows Boot Genius.
step 1. Launch the program and insert the CD/DVD disc into your CD-ROM drive or connect your USB flash drive to your computer’s USB port. Then click “Create a bootable disc now” to start burning the repair disc.
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Step 2. Select the OS you want to fix, then select the drive where you want to create boot media. Then click Next and the download of the Recovery Environment ISO will begin.
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CAUTION: Please note that this will erase your boot media. Also, back up your data in advance.
Step 3. After the repair environment ISO has finished downloading, make sure the network is properly connected.
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Step 4. Once the boot disk is created, power on the non-booting computer and start booting.

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Above, I explained what to do when an error occurs after applying the update program KB5021233 for Windows 10 version.
If you can’t boot your computer even after returning to the previous version of your computer and booting into safe mode and executing the command, we recommend using the Windows boot solution tool “4DDiG Windows Boot Genius”. You can boot a frozen Windows in various situations.
About Tenorshare 4DDiG
Tenorshare 4DDiG Data Recovery Software: Recover various types of files including photos, videos, music, documents like Word, PPT, PDF, Excel, etc. on Windows & Mac.
4DDiG Windows Boot Genius: Auto-repair Windows issues such as blue/black screens, system crashes, etc. in minutes.
Tenorshare Duplicate File Deleter: Remove duplicate files on Windows & Mac to improve computer performance.
File Repair: Repair corrupted photos and videos.
4DDiG official website:
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