Unknown Hard Error appearing inwards Windows 10 tin hold upwards an unpleasant situation. The occurrence of it leads to abrupt disappearance of Desktop icons, freezing of the taskbar in addition to blackening of the screen. Every fourth dimension you lot endeavour to launch Windows, the organisation flashes a message stating that it’s a critical mistake in addition to or in addition to then applications (Start in addition to Cortana) won’t work.
Upon a flake of investigation, you lot break sihost.exe isn’t responding in addition to this is responsible for c000021a Unknown Hard Error to appear. Sihost.exe files stand upwards for Shell Infrastructure Host which happens to hold upwards a pith component division of the Windows environment. It is this Windows Shell Infrastructure Host which is primarily responsible for treatment several graphical elements of the OS interface similar Start card in addition to taskbar transparency.
So, if SIHost or Shell Infrastructure Host is either stopped, corrupted or removed, at that spot volition hold upwards issues amongst the overall functionality of the operating system, in addition to you’ll kicking the bucket this error.
Likewise, ctfmom.exe Unknown Hard Error may arise due to incompatible drivers installed on the computer. cftmom is a procedure that identifies inputs similar handwriting, languages, etc. in addition to thence controls functions of background behavior.
What course of education of activeness should hold upwards followed afterward that to resolve the issue? We evidence to expression at or in addition to then of the solutions here.
Fix Unknown Hard Error inwards Windows
Firstly, you lot should evidence to break out which application is responsible for the running of the sihost.exe file. If required, update/reinstall the application or bring it removed temporarily.
System File Checker
Next, you lot tin run System File Checker. The System File Checker or sfc.exe is a utility inwards Microsoft Windows located inwards C:\Windows\System32 folder. This utility allows users to scan for in addition to restore corrupt Windows organisation files. Before proceeding further, you lot should kickoff decide whether the sihost.exe on your calculator is a Trojan that you lot should remove, or whether it is a file belonging to the Windows/trusted application.
Use System Restore
There are several ways to dorsum upwards your PC. One of them is creating a restore point. You tin restore your calculator using System Restore to an before proficient signal inwards time. Restore points are automatically created each calendar week yesteryear System Restore in addition to when your PC detects change.
Troubleshoot inwards Clean Boot State
Clean Boot State refers to the procedure of starting a calculator organisation amongst solely the well-nigh essential files in addition to services required yesteryear the OS. It is used to diagnose in addition to troubleshoot advanced Windows problems. If your calculator is non starting normally, or if you lot have errors when you lot laid about the calculator that you lot cannot identify, you lot could visit performing a “clean boot.”
When you lot laid about the calculator inwards construct clean boot, the calculator starts yesteryear using a pre-selected minimal laid upwards of drivers in addition to startup programs, in addition to because the calculator starts amongst a minimal laid upwards of drivers, or in addition to then programs may non piece of employment every bit you lot expected.
Hope something hither helps you!
Source: https://www.thewindowsclub.com/
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