0xc000021a PC Ran into problem and needs to restart
This error is commonly known to appear after Windows fails to install a new Windows Update, in most cases the update will keep failing and you will be stuck in a endless loop of restarting. This post can possibly help you overcome this problem.
Troubleshooting the Problem
Boot into Safe Mode
You’ll first need to boot into Safe Mode, you can read how to do that in this post: Boot into Windows Safe Mode in Windows 8
Then open an Elevated Command Prompt:
- Open Start
- Type CMD
- Right-click on Commandprompt and choose Run as Administrator
or Boot into Windows Recovery Environment
Or if you can’t reach Safe Mode then start Windows Recovery Environment, you can read how to do that here: Boot into Windows RE
You’ ll then need to start an Elevated Command Prompt:
- Click on Troubleshoot
- Click on Advanced Options
- Click on Command Prompt
- Choose your operating system
- Choose your account
Entering the command prompt commands
We have now reached Command Prompt, in this Windows we going to enter three commands that will hopefully solve your problems.
- Type: “DISM /image:C\ /cleanup-image /revertpendingactions”
- Then type: “move C:\Windows\WinSxS\pending.xml C:\Windows\WinSxS\pending.old”
Restart your system and see if it now boots again.[symple_box color=”red” fade_in=”false” float=”center” text_align=”left” width=””] In some cases the Windows drive will be labelled X. If using C: gives you troubles then try X first.
Hopefully the problem has been solved using these steps.