
The “Unknown Hard” error that keeps on appearing in Windows 10 can put users in an unpleasant situation. This kind of error leads to the freezing of the taskbar, blackening of the screen, and sudden disappearance of the icons on the Desktop. And each time you try to open Windows, the system will only give you an error message saying that it’s a critical error and some applications like Start and Cortana won’t work.
Upon analysis, it seems that the “sihost.exe” is not responding and that it is the one that’s causing the c000021a Unknown Hard error to pop up. Sihost.exe files represent the Shell Infrastructure Host which is an essential component in the Windows operating system. The Windows Shell Infrastructure Host is primarily responsible for handling some graphical elements of the operating system interface such as the Start menu and the taskbar transparency. And so if the Shell Infrastructure or Sihost.exe has stopped, has been removed, or corrupted, you will most likely have issues with the overall functionality of the Windows operating system and you’ll get the Unknown Hard error
In addition, the ctfmom.exe Unknown Hard error may also occur due to incompatible drivers installed on your PC. Ctfmom is a process that identifies inputs such as handwriting, languages, and many more. It’s the one that controls the functions of background behavior. To resolve this issue, you need to first try to identify which application is the one that’s running the sihost.exe file. And if needed, you need to either update or reinstall or completely uninstall the problematic application.
The SFC Scan or System File Checker, us a built-in utility in Microsoft Windows that can be found in the C:\Windows\System32 folder. This tool allows users to scan and restore any corrupted system files in Windows that might be causing the Unknown Hard error to appear. Before you use this tool, make sure to find out whether the sihost.exe on your computer is a Trojan that you have to remove or if it’s a file that belongs to a trusted Windows application. Once you have that sorted out, follow the steps below.
The command will start a system scan which will take a few whiles before it finishes. Once it’s done, you could get the following results:
You can also try using System Restore. This is one of the ways you can use it to back up your PC. Since restore points are created automatically each week by System Restore, you can use System Restore to restore your computer back to an earlier good point in time.
Putting your PC in a Clean Boot state can help you diagnose and troubleshoot the issues in your system. During this state, you can start the system with a minimum number of drivers and startup programs that will surely help you in isolating the root cause of the Unknown Hard Error.
After putting your PC in a Clean Boot State, try creating a system restore point and see if the problem still occurs. Clean Boot troubleshooting is designed to help you isolate the problem. For you to execute a clean boot troubleshooting, you must do a couple of actions (the steps are given above) and then restart your PC after every action. You might have to disable one third-party app after the other to really isolate the issue. And once you’ve narrowed down the problem, you can either disable the third-party app that’s causing the problem or remove it. Note that you must switch your PC back into the Normal Startup mode after you’re done troubleshooting the problem. Here’s how you can do it:
You may experience error code 24 when you try to use a device on your PC that is not properly installed or its driver is corrupted. Code 24 is a Device Manager error and it pops up on your computer screen in the following format:
“This device is not present, is not working properly, or does not have all its drivers installed. (Code 24)”
Error code 24 may be triggered due to several reasons. However, the most common causes for this error code include:
It is recommended to resolve the error code to ensure your PC works at its optimal performance. Error code 24 can lower the device functionality and PC performance dramatically.
Since this error code can mean several different things, troubleshooting it can be quite tricky but to make it simple to resolve, we have listed down some easy methods to repair error code 24.
Try these methods to fix error 24 on your PC and ensure your system works at its optimal pace. Let’s get started….
Problems with BIOS, the controlling software in the PC motherboard, can sometimes trigger hardware conflicts resulting in Device Manager error code pop-ups.
In such a scenario, it is advisable to update BIOS. To update, go to your PC motherboard manufacturer’s website. Here you will be able to find instructions on updating BIOS.
Follow the instructions carefully to resolve error code 24 on your system. If the error code still persists, then try other methods discussed below.
If you experienced code 24 on your PC after installing new devices, then it is advisable to remove them to resolve the error code.
If the device is attached to your computer, then simply disconnect and remove it immediately. Once you disconnect it, reboot your system to activate changes.
If device removal does not resolve the problem, then consider updating the device driver. Code 24 is also related to driver problems.
It can occur if a device driver is corrupted or outdated. In such an event, it is advisable to update the driver by installing the new and latest device driver version on your PC.
For doing this, simply download the latest device driver version from the manufacturer’s website and update it.
Finding problematic drivers and the latest device driver versions to update them, however, can be time-consuming and sometimes even frustrating. To avoid being in this situation, it is advisable to download DriverFIX.
DriverFIX is a cutting-edge, user-friendly and an innovative program exclusively designed to resolve device driver related issues and problems on computer systems
It is integrated with the newest technology and intelligent programming system that enables and empowers PC users like you to repair device driver error codes in seconds.
Once you install this software on your PC, simply run it. The software program instantly detects all problematic drivers and updates them with their latest versions available on the internet.
All this is done in mere seconds and it’s not time-consuming at all. Moreover, device driver updates are performed frequently to ensure that you don’t experience any driver problems again.
Click here to download DriverFIX and repair Device Manager error code 24 right away.
If you’ve recently tried installing Windows 10, you might have encountered error code 0x80070070 – 0x50011 or its alternatives (error code 0x80070070 – 0x50012 and 0x80070070 – 0x60000). Whatever formats this error code presents itself in, it's usually accompanied by a barrage of other errors, as underscored on Microsoft’s official site. If you’ve encountered this error code, it simply means that your computer system might not have the required or required space to install the upgrade.
Likely, if you’ve experienced error code 0x80070070 – 0x50011, it’ll likely appear in the formats highlighted below:
At present, this Windows 10 upgrade error is triggered or caused by various factors:
Whilst new, not much information has been propagated regarding this error. However, there are some manual / practical steps you can take to have your Windows 10 upgrade up and running. Since the primary aspect of solving this problem is to make space on your computer system, here are some ways in which you can do so manually.
Before making attempts to create space on your computer, it’s vital that you check to decipher how much free space you have available.
Since there’s a free service available on your computer to create space, why not use it and save time? If the Disk Cleanup tool is employed regularly, this will free up hard drive space and optimize your computer to work better.
There are several apps lying around on your computer that you simply don’t use, uninstall those and make space to elude error code 0x80070070 – 0x50011 or its alternatives (Code 0x80070070 – 0x50012, Code 0x80070070 – 0x60000)
If you have lots of photos, media, documents (files), videos, etc, that you don’t use or will only need in the future, try cloud storage. You’ll still have those files within your possession but just not in a physical location. However, they’re still accessible. Another suggestion: If you use programs such as One Drive or Google Drive for desktop, limit your use to only the online application.
If you’re not able to implement the above steps to clear some space to accommodate your Windows 10 upgrade due to error code 0x80070070 – 0x50011, acquire more storage. This can be expanded by incorporating storage devices such as USB flash drives, CDs, cloud storage, and SD Cards.
If you regularly download stuff, especially software on the Internet from ‘not so secured’ sites, you might have picked up something. You might have downloaded malware or virus (along with other legit programs).
To resolve this issue, it’s advised and very important that you download a powerful antivirus and perform a complete scan of your computer system. After you’ve detected and removed the suspected malware/virus, you’ll then be able to eliminate error code 0x80070070 – 0x50011 and resume with your Windows 10 upgrade.
If you do not clean your computer’s registry often, it could become congested or clogged by .XML files, junk files, and cookies. To resolve this problem, clean your registry by using a powerful and user-friendly tool to clean up the problem.
Click here to download Restoro.
DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:C:RepairSourceWindows /LimitAccess
net stop wuauserv net start cryptSvc net start bits net start msiserver
net start wuauserv net start cryptSvc net start bits net start msiserver
SMSFromBrowser is a Browser Extension developed by MindSpark. This extension usually comes bundled up with other software or via online advertising. Allegedly this extension allows you to send SMS messages from your computer, however, all it does is point you to other websites that offer this service. While active this extension monitors your browsing behavior, it records your website visits, clicks, links, and sometimes even private information, in order to use this data to better serve additional ads. During your browsing sessions, you may encounter additional unwanted ads, sponsored links, and sometimes even pop-up ads. Several anti-virus scanners have detected this extension as a potentially unwanted extension / Browser Hijacker, and due to its privacy mining behavior, it is not recommended to keep it on your computer.
Browser hijackers (sometimes referred to as hijackware) are a kind of malicious software that modifies web browser settings without the computer owner’s knowledge or permission. These hijacks appear to be increasing at an astonishing rate around the world, and they could be actually nefarious and sometimes harmful too. Browser hijackers are capable of doing more than just modifying homepages. These are typically used to force hits to a specific site, manipulating web traffic to generate ad revenue. Though it might seem naive, these tools are made by vicious people who always try to take advantage of you, so that they can easily make money from your naive and distraction. As soon as the program attacks your laptop or computer, it starts to mess things up a whole lot that slows your system down to a crawl. In the worst-case scenario, you will be forced to deal with serious malware threats as well.“EventData BugcheckCode 159 BugcheckParameter1 0x3 BugcheckParameter2 0xfffffa80029c5060 BugcheckParameter3 0xfffff8000403d518 BugcheckParameter4 0xfffffa800208c010 SleepInProgress false PowerButtonTimestamp 0Converts to 0x9f (0x3, 0xfffffa80029c5060, 0xfffff8000403d518, 0xfffffa800208c010)”This kind of BSOD error is caused by an issue with the Power Supply components in both the software and hardware parts of your computer. In such cases, if your computer is stuck in a reboot loop, you need to troubleshoot the problem via Safe Mode or in the Advanced Startup options screen.
PuzzleGamesDaily is a Browser extension developed by Mindspark. This extension monitors user activity such as website visits, clicked links and other web-related tasks that It later uses to display targeted ads.
When installed it changed the default home page, search engine and new tab page to MyWay.com, and while browsing the internet with this extension active you will see additional pop-up ads, injected (unwanted) ads, and sponsored links during your browsing sessions.
From the Terms of Use: You hereby acknowledge and agree that by using an MS Product you may be exposed to Content that may be offensive, indecent or objectionable in your community […] MS Products are exposed to various security issues, and should be regarded as insecure. By accepting this Agreement, you acknowledge and accept that the MS Products and any information you download or offer to share by means of an MS Product, may be exposed to unauthorized access, interception, corruption, damage, or misuse, and should be regarded as insecure. You accept all responsibility for such security risks and any damage resulting therefrom.
This extension has been marked as a Browser Hijacker by several anti-virus scanners and has been flagged for optional removal. It is not considered malicious but many users wish to remove it due to the above reasons.