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:

“Windows Media Player cannot burn some of the files. To investigate the problem, click the icon next to the files in the burn list.”As you know, the Windows Media Player helps you burn songs or audio files to CD or disk but it does not always end up successfully as you could encounter some setbacks such as this particular error. Usually, this kind of issue occurs if an audio file does not comply with some restrictions so the Windows Media Player pops up this error instead. You can encounter this error message if:
So there are several problems that can cause this error like issues with accessing the Microsoft servers, corrupt system files, settings being misconfigured, malware infections, or conflicting applications. We will cover all solutions for each scenario taking approaches from most simple solutions to more complex ones. Follow the guide and let's fix this annoyance.
Error Causes
Like in Windows 10, Windows 11 will also support God mode to be enabled and used. For those readers that do know what God mode is, let me explain it in simple terms. God mode is the icon on the desktop that once clicked will open and let you adjust every option in the control panel and some hidden features for Windows inside one application.
There are a lot of advantages to having this one-click fast access to features, especially if you are a power user. Luckily creating such an awesome icon and enabling God mode is very easy to accomplish, all you have to do is:
CalendarSpark is a browser extension developed by MindSpark. This extension allows an easy way to print or view calendar templates and make schedulers for a day/week/month/year. This browser extension hijacks your browser home page and search engine, changing them to MyWay.com. While the extension is installed it monitors your browsing activity and collets visited websites, clicked links, and sometimes even personal information, which it later uses to display targeted unwanted ads through your browsing sessions.
While browsing the internet with this extension installed you will see additional sponsored links, ads, and sometimes even pop-up ads on websites that are not supposed to have any of these. Several anti-virus scanners have detected this extension as a Browser Hijacker, and due to its data collecting behavior, it is not recommended to keep it on your computer.
In the Windows ecosystem, MS Surface laptops are among the best laptops on the market, they are regarded as equivalent to Apple MAC laptops but for Windows. Microsoft Fall 2022 Event will be held on October 12th at 10 AM. The event itself will be held right before it kicks off its annual, developer-focused Ignite event in Seattle from that same day through October 14.

This event is the first in-person event that Microsoft has held since the beginning of the pandemic. We expect the launch of the Surface Pro 9 and the Surface Laptop 5, and maybe Surface Studio 3 as well. There are also some rumors about products themselves like choices between an ARM or x86 CPU but nothing is confirmed so far, we can just wait and see.