How to Fix Error Code 0x8007267C on Your PC

Booting the Windows computer system includes loading it from the various boot devices such as drivers, network as well as USB drives when the computer is turned on. The instant the startup sequence is done loading the operating system the system hardware will be ready to perform some complex operations – in this process, the Boot Log in Windows 10 is a record that maintains the list of success or failure of many pieces of Windows 10 system during the booting process. In other words, the Boot Log is the one that keeps a record of all that has happened while loading from the computer storage system to the memory during the boot process. It is available for several devices like network, hardware devices, and the operating system which assist in detecting issues during the boot process and other issues with regards to troubleshooting. Through Boot Log, you’ll know which drivers were unloaded and loaded from the start of the system during the boot process. You have the option to either disable or enable this feature on your Windows 10 PC. Named as “ntbtlog.txt”, the log file lists all the successfully loaded processes and the unsuccessful ones during the boot process. It is saved to the drive C:Windowsntbtlog.txt. As mentioned, you can enable or disable this feature in two ways – the first one is by using the System Configuration or MSConfig while the second one is using the Command Prompt. In this post, we’ll show you how you can enable or disable Boot Log in Windows 10 either way.

Option 1 – Enable or Disable Boot Log using System Configuration

Enable Boot Log:

• Tap the Win + R keys to open the Run dialog box.
• Then type in “msconfig” and click OK to open System Configuration.
• After that, go to the boot tab and check the checkbox labeled “Boot Log” under the Boot options so that you can enable the Boot Log feature.
• Then click on OK to save the changes made.
• Next, click on the Restart button in the prompt window to get started with the Boot Log process.
• After restarting your PC, go to C:Windowsntbtlog.txt to open the boot log.

Note: As pointed out earlier, the log file contains a list of all the successfully loaded drivers and also the list of drivers that failed to load during the boot process and every time you restart the system, the boot log file will keep on updating and will eventually increase the list of entries. For you to locate the drivers and make your troubleshooting a lot easier, I advised disabling the boot log after troubleshooting. To disable the boot log using System Configuration, refer to the steps below. Disable Boot Log:

• Tap the Win + R keys to open the Run dialog box.
• Then type in “msconfig” and click OK to open System Configuration.
• After that, go to the boot tab and unmark or uncheck the checkbox labeled “Boot Log” under the Boot options so that you can disable the Boot Log feature.
• Then click on OK to save the changes made.

Option 2 – Enable or Disable Boot Log using Command Prompt

Enable Boot Log:

• Go to the Start Menu and then type in “command prompt” in the search bar.
• After that, right-click on the Command Prompt option and select the “Run as administrator” option.
• After opening Command Prompt, type in “bcdedit” and tap Enter.

Note: You have to find the Identifier of the current operating system first to enable the Boot log. You can find it under the Windows Boot Loader section in the “Description” field and in this case, it’s Windows 10. You can also find the operating system identifier under the Windows Boot Loader section next to the field name identifier.

• To check if the boot log entry is disabled or enabled, go check the “Bootlog” field under the Windows Boot Loader. And if it turns out that the “bootlog” entry is enabled, the entry will be “Yes”. Otherwise, the entry will be “No”.
• Next, type in the following command with the operating system identifier to enable the boot log.

bcdedit /set {identifier} bootlog Yes

Note: In the command given above, make sure that you replace the given system identifier with your computer’s system identifier. For instance: In this example, the identifier was replaced with the actual operating system identifier as current.

bcdedit /set {current} bootlog Yes

• Afterward, restart the system to start the Boot log process.
• After the restart, go to C:Windowsntbtlog.txt to open the boot log.

Note: Every time you restart your computer, the boot log file will keep on updating which will increase the size of the log eventually. So if you want seamless and easier troubleshooting, it is advised to disable the Boot log after you troubleshoot. To disable it using the Command Prompt, here’s what you have to do. Disable Boot Log:

• Go to the Start Menu and then type in “command prompt” in the search bar.
• After that, right-click on the Command Prompt option and select the “Run as administrator” option.
• Once the Command Prompt is opened, type in the following command and then tap Enter to disable the boot log feature.

bcdedit/ set {identifier} bootlog No

Note: In the command given above, you need to replace the given system identifier with your computer’s system identifier. For instance: In this example, the {identifier} was replaced with the actual operating system identifier as {current}.

bcdedit /set {current} bootlog No

• Now close the Command Prompt.

High Efficiency Image File Format (HEIF) is a container format for individual images and image sequences. The standard covers multimedia files that can also include other media streams, such as timed text, audio, and video. A HEIF image using High-Efficiency Video Coding, HEVC, requires only about half the storage space as the equivalent quality JPEG. HEIF also supports animation and is capable of storing more information than an animated GIF or APNG at a small fraction of the size. HEIF files are a special case of the ISO Base Media File Format (ISOBMFF, ISO/IEC 14496-12), first defined in 2001 as a shared part of MP4 and JPEG 2000. Introduced in 2015, it was developed by the Moving Picture Experts Group (MPEG) and is defined as Part 12 within the MPEG-H media suite (ISO/IEC 23008-12). HEIF was adopted by Apple in 2017 with the introduction of iOS 11, and support on other platforms is growing.

HEIF files can store the following types of data:

Image items

Storage of individual images, image properties, and thumbnails.

Image derivations

Derived images enable non-destructive image editing and are created on the fly by the rendering software using editing instructions stored separately in the HEIF file. These instructions (rectangular cropping, rotation by one, two or three quarter-turns, timed graphic overlays, etc.) and images are stored separately in the HEIF file, and describe specific transformations to be applied to the input images. The storage overhead of derived images is small.

Image sequences

Storage of multiple time-related and/or temporally predicted images (like a burst-photo shot or cinemagraph animation), their properties, and thumbnails. Different prediction options can be used in order to exploit the temporal and spatial similarities between the images. Hence, file sizes can be drastically reduced when many images are stored in the same HEIF file.

Auxiliary image items

Storage of image data, such as an alpha plane or a depth map, which complements another image item. These data are not displayed as such but used in various forms to complement another image item.

Image metadata

Storage of EXIF, XMP and similar metadata which accompany the images stored in the HEIF file.

There are instances when you open a picture or an image in the Windows Photo Viewer and instead of displaying the image, it displays nothing and you’ll see an error message instead that says, “Windows Photo Viewer can’t display this picture because there might not be enough memory available on your computer”. Although this may look like a clear-cut issue of less storage space or low RAM in your computer, that’s not always the case. Security experts noticed that even when your computer has enough resources and disk space, this kind of problem could still occur. So if you experience the same thing, you need to check the Color Profile of your screen. For more information, refer to the detailed instructions provided below but before you proceed, make sure that you close some processes in the Task Manager or restart your computer and see if it helps in fixing the problem. You can also try using the Disk Cleanup tool. To use it, refer to these steps:

• Tap the Win + R keys to open the Run dialog box and then type “cleanmgr” in the field and hit Enter to open the Disk Cleanup window.
• After that, select the drive you want to clean.
• Now click OK to clean the disk and restart your computer.

If the Disk Cleanup tool didn’t help in resolving the issue, refer to the instructions below. Step 1: In the search box, type “color management” and then select the “Change advanced color management settings for display” option from the search results. Or you could simply go to Settings > System > Display, Advanced display settings, and from there, select display and click on the Display adapter properties of Display. Step 2: Next, switch to the Color Management tab and click on the Color Management button. Step 3: Select the monitor where you’re getting the “Windows Photo Viewer can’t display this picture because there might not be enough memory available on your computer” error in the next window. And if you have two displays, make sure that you select the primary display. You also have an option to identify the monitor. Step 4: Once confirmed, select the “Use my settings for this device” checkbox. Step 5: After that, select the Profile listed under the “Profiles associated with this device” option and then click on Remove. Step 6: Next, go to the Advanced tab and make sure that all settings are set to System default which includes a device profile, perceptual images, rendering intent, Relative Colorimetric, and many more. Step 7: Once you’re done, you have to restart your computer and then try to open the same image you were trying to open earlier and then check if you can now open it instead of seeing the error.

The quickest way to control and manage the volume of your Windows 10 PC is using the Volume control icon in the system tray. However, you might encounter issues in using it especially if you recently updated your PC. After the update, if it no longer responds to mouse clicks, be it a right-click or left-click, read on as this post will show you what you can do to remedy that issue. If you think that you’re the only one who has experienced this problem, you are mistaken as several users also reported that the volume icon does highlight and shows the volume level if you hover the cursor over it but it does not really do anything at all. This is definitely the quickest way to change the audio output in Windows 10 especially when you have to change from speakers to your earphone and whatnot. If you are one of the users whose Windows 10 Taskbar Volume Control icon has stopped working and every time you click on the icon and nothing happens and you’re still not able to adjust the volume of your Windows 10 computer, read on as this post will show you what you can do to fix that problem. Although the audio is working just fine, you will still not be able to adjust the volume from its control icon. The problem is most likely related to the UI interaction. There are times when icons in the taskbar also experience the same issue where you can hover your mouse over them but nothing happens when you click on them. As mentioned, the issue with the volume icon does not seem to affect the actual audio of the computer. Double-check to confirm and if it turns out that the audio is indeed working fine, you can use the hardware of your keyboard to manage and control the volume, however, the software just won’t work. This issue is really inconvenient especially for users who connect their laptops to a bigger display. To fix this issue, here are some suggestions you need to check out.

Option 1 – Try to restart the Windows Explorer

This option may sound silly but it has actually worked in fixing the issue for some users. So if anything gets stuck on the taskbar or system tray, the best way to revive them is by restarting Windows Explorer.

• Right-click on the taskbar and then select the Task Manager.
• Next, look for Windows Explorer under the Processes tab.
• Then right-click and select restart.
• After that, wait for the restart process to be completed and for the user interface to refresh. Note that you will notice the Taskbar disappearing and reappearing again. It will reload the entire user interface and allows you to access the volume icon. It should work this time.

Option 2 – Restart the Audio services

Restarting the audio services in your computer can also help you fix the volume control issue and to do that, refer to these steps:

• Tap the Win + R keys to open the Run dialog box.
• Type in “services.msc” in the field and hit Enter to open Services.
• From there, look for Windows Audio and then right-click on it and go to Properties.
• After that, you have to make sure that the Startup Type is set to Automatic.
• Then click on the Stop button. Once it has stopped, start it again.
• Now restart your computer and see if you can now access the volume icon on the taskbar.

Option 3 – Try to update or roll back the Audio driver

If the glitch in your audio has something to do with software, chances are it might be related to the audio driver – it could be that the newest version of your Windows 10 does not work well with the old version of the driver. This is why you have to update your audio driver to the newest available version.

• Tap the Win + R keys to open the Run dialog box and then type in devmgmt.msc and tap Enter or click OK to open the Device Manager.
• Expand the section for the outdated device drivers.
• And then select the outdated driver(s) and right-click on it/them.
• From the drop-down menu, select the Update Driver option and follow the on-screen instructions to install the latest version of the driver.
• Then also click on the option, “Search automatically for updated driver software.
• Restart your PC after the installation.

Note: If updating the Audio driver didn’t work, you can go to the website of your PC manufacturer and look for the support section where you can download the drivers for your computer. You just need to take note of your PC’s correct model and model number so you can find the appropriate driver.

Option 4 – Try running the Playing Audio Troubleshooter

Since the Windows 10 operating system has the Playing Audio Troubleshooter, you can use this troubleshooter to try and fix the volume control issue on your PC. You can access this tool in the Control Panel or in the Taskbar Search and even on the Troubleshooters page of Windows 10. Run this troubleshooter and see if it can fix the issue or not.

Well if anyone told me just a few years ago that I will see the day when Microsoft releases a new OS based on Linux I would be very amused, but that day has come. Mariner is the newest OS out of nowhere. Microsoft’s new Linux Distro, dubbed Common Base Linux (CBL)-Mariner, isn’t the type of distro you’d want to install directly on any old machine. It’s primarily meant for cloud infrastructure and edge products. Specifically Microsoft’s Cloud and Edge products. But if you are curious, it’s possible to run. Juan Manuel Rey, a Microsoft Senior Program Manager for Azure VMware, recently published a guide to ISO CBL-Mariner image. With that, you can easily get it up and running. And you can build CBL-Mariner on an Ubuntu 18.04 desktop. So you can try it out since it is free. You can get it from here: https://github.com/microsoft/CBL-Mariner It is obvious that Microsoft aims to set itself as a leader in enterprise server environments with this move and it is very likely that it may succeed or at least give a good shake to its competitors, mainly red hat and Suse which are two dominant distros in that field. Many believe that they can win over by providing regular updates and package delivery via their already established system and that feature could be a turning point for some. In any case, time will tell and we shall see.

If you’re having some problem browsing multiple websites on the Firefox browser on your Windows 10 computer, then this post might be of help. One of the most common problems you could encounter in Firefox is mostly related to HTTPS and one of them is the MOZILLA PKIX ERROR MITM DETECTED or ERROR SELF SIGNED CERT or SEC ERROR UNKNOWN ISSUER error which means that Firefox was unable to trust certificates issued on secured websites. If you encounter the MOZILLA_PKIX_ERROR_MITM_DETECTED error in Firefox, this indicates that something in your network or system is interrupting your connection and injecting certificates and when that happens, Firefox won’t trust it. In such cases, one of the culprits is malware. Malware will try to replace a legitimate certificate with its certificate. Another cause is security software where it keeps a tab on a secure connection and creates a false positive, for instance:

“In Microsoft Windows accounts protected by Family Safety settings, secure connections on popular websites like Google, Facebook and YouTube might be intercepted and their certificates replaced by a certificate issued by Microsoft in order to filter and record search activity.”

And if you are connected to a corporate network, there might be a monitoring/filtering product that could be replacing certificates. Moreover, there are also users who reported getting this issue when they use the Nightly version of Firefox. And if that’s the case, you have to try accessing secure websites using only the stable build especially when it comes to payments. However, if you are not doing that, then here are some options you need to check out.

Option 1 – Try turning off HTTPS Scanning on your security and antivirus programs

Each security-based software has a security option that allows you to turn off the HTTPS scanning functionality. They may be available under different names such as HTTPS Scanning, Scan SSL, Show safe result, Do not scan encrypted connections, etc. Find what is applicable for your security or antivirus software and then try turning it off temporarily and see if it helps in fixing the MOZILLA_PKIX_ERROR_MITM_DETECTED error in Firefox.

Option 2 – Try to disable security.enterprise_roots.enabled

The next thing you can do if the first option didn’t work is to disable security.enterprise_roots.enabled which is an HTTPS certificate check on Firefox. Note that this is not recommended but you have to at least try in order to fix the error.

• Open Firefox and then type “about: config” in the Firefox address bar and hit Enter.
• After that, if an info message appears, confirm it.
• Next, search for the security.enterprise_roots.enabled preference and once you found it, double click on it.
• Then change its value to true and restart the Firefox browser once. This will import all the custom certificates from the other security software into Firefox. As a result, it will make sure to mark those sources as trusted and you won’t get the MOZILLA_PKIX_ERROR_MITM_DETECTED error.

Error code 0x803f7000 -What is it?

Error code 0x803f7000 refers to an issue in Windows 10 with downloading apps through Windows Store. When you choose the app or game to download, it heads to Downloads in the Store app. Then it says it is acquiring a license but then fails. When you click the “See details” link, you see the error code 0x803F7000. It could mean that the date and time or region settings in your Windows 10 are incorrect or there are some problems with the Windows Store Cache.

Symptoms

• This error appears when you are running Windows 10 and trying to download an app through the Microsoft store. The error code may appear with this message: “Something went wrong. The error code is 0x803f7000, in case you need it”
• You might also see this message along with the error code: "It looks like you've reached your device limit for installing apps and games from the Store on your Windows 10 device. If you want to install apps and games from the Store on another Windows 10 device, remove a device from the device list."

Solution

Error Causes

There may be several reasons for this error:

1. This problem may arise if the date and time in Windows 10 are incorrect.
2. If the region has been set incorrectly.
3. Problems with Windows store cache.
4. Windows store server overloaded.
5. The Windows version you are using is pirated.

Further Information and Manual Repair

Method 1:

Correcting date and time:

• Open up Control Panel > Clock, Language, and Region.
• Then click on Date & Time.
• Now click on Change date & time to correct your time.

Method 2:

Correcting region:

• Navigate to Control Panel > Clock, Language, and Region.
• Then click on Region.
• Then click on the Location tab.
• Now set your actual region from Home location section.
• Click Apply & OK.

Method 3:

Resetting Windows Store:

• Press Windows Flag Key + X from your keyboard. Then select Command Prompt (Admin). It will launch Command prompt as administrator.
• Then type wsreset and hit Enter.
• Wait for a few seconds. It will automatically open Windows Store.
• Then try to download any apps.

Method 4:

1. Open Command prompt in local machine and type in the Windows Store reset tool exe
2. Activate Windows by going to Settings>Updates and Security
3. Run the Modern UI/metro app troubleshooter from Microsoft
4. Keep trying it several times.
5. Try changing locale and time zone to the United States as shown below
6. Go to control panel, Language settings
7. Select location to the United States
8. This will reset the language to US English. After this try downloading the apps again.
9. Try restarting the Windows Updater service or restart the machine once.

You must make sure that you have a good internet connection. You need that for the updates and downloads complete without disruption.

Method 5:

Make sure the app isn’t blocked by the Windows firewall: To make your PC more secure, some apps are blocked by Windows Firewall by default. For proper functioning, you might need to enable an app to receive info through the firewall. For more info, see the "Allow an app to receive info through the firewall," and follow the procedure from start to finish.

Method 6:

Check with your system admin: If your PC is part of a network in an organization, like a business, school, or government agency, your system administrator might have turned off the use of certain apps using the Group Policy. Contact your system admin if you believe that Group Policy is preventing you from using an app.

Method 7:

Make sure your apps are up-to-date: To make the apps working properly, you must keep your apps up-to-date. This could be done by turning on automatic updates in the Windows Store.

Method 8:

Contact the app publisher To view the publisher’s app support info, follow these steps:

1. On the Start screen, tap or click Store to open the Windows Store.
2. Search or browse for the app, and then tap or click it.
3. Scroll to the Details section of the app's description page, and then tap or click the support link for the app under Learn more. The link will open an email message for you to contact support or will take you to a support website.

If you do not possess the technical expertise required to accomplish this yourself or do not feel comfortable doing so, download and install a powerful automated tool to get the job done.

There are times when you may encounter some glitches on your Google Chrome browser in your Windows 10 computer. One of these glitches is when the connection status of Chrome keeps on saying “Waiting for cache” which is displayed at the bottom-left side of the browser in the Status bar. At the time of writing, it isn’t clear yet what could be causing this problem. Although it is possible that it’s caused by browser cache, some extensions in the browser. On the other hand, it could also be caused by the browser profile or due to some fragmented files or that the SSD is occupied. Whatever the cause is, you can check out each one of the given options below to fix the problem.

Option 1 – Try clearing browser cache

There are times when some data in the browser is conflicting with the loading of the website and triggers some problems like “Waiting for cache”. And so you can try to clear your browser’s data. This might be a very basic solution but oftentimes it works in fixing this kind of error in Google Chrome. Follow the steps below to clear the data in your browser.

• Open your Google Chrome browser.
• After that, tap the Ctrl + H keys. Doing so will open a new panel that allows you to delete the browsing history and other data in your browser.
• Now select every checkbox that you see and click on the Clear browsing data button.
• Then restart your Chrome browser and check if you can now open any website or not.

Option 2 – Try to disable writing of Cache files to the SSD

You can also disable the writing of Cache files to the SSD to stop Google Chrome’s dependency on the SSD to gather all the cache files.

Option 3 – Delete the User Profile in Chrome

You can also try deleting the User Profile folder in Chrome. To do so, follow these steps:

• You need to first end every single process of Google Chrome. To do so, right-click on the Taskbar then select the Task Manager. And if the Task Manager is not responding, you can just use the Alt + Ctrl + Del keys and then select the Task Manager.
• After opening the Task Manager, under Processes, look for Google Chrome’s process which would most likely be named “chrome.exe”.
• Right-click on Google Chrome’s process and then select the End task option.
• Next, tap the Win + R keys to open the Run dialogue box.
• Then copy and paste “%USERPROFILE%AppDataLocalGoogleChromeUser Data” and hit Enter.
• From there, look for a folder named “Default folder” and then copy the folder to another drive as a backup.
• After creating a copy of the folder, delete the Default folder.
• Next, open Google Chrome again and go to Settings > Advanced > Reset.

Option 4 – Reset Chrome

Resetting Chrome can also help you fix the error. This means that you will be restoring its default settings, disabling all the extensions, add-ons, and themes. Aside from that, the content settings will be reset as well and the cookies, cache, and site data will also be deleted. To reset Chrome, here’s what you have to do:

• Open Google Chrome, then tap the Alt + F keys.
• After that, click on Settings.
• Next, scroll down until you see the Advanced option, once you see it, click on it.
• After clicking the Advanced option, go to the “Restore and clean up option and click on the “Restore settings to their original defaults” option to reset Google Chrome.
• Now restart Google Chrome.

Option 5 – Try to clean reinstall Chrome

There are instances when programs leave files behind after you’ve uninstalled them and the same thing can happen to Chrome so before you reinstall Chrome, you have to make sure that you have deleted the User Data folder. To do so, refer to the following steps:

• Hit the Win + R keys to open the Run dialog box.
• Next, type “%LOCALAPPDATA%GoogleChromeUser Data” in the field and hit Enter to open the User Data folder.
• From there, rename the default folder and name it something else, e.g. “Default.old”.
• After that, install Google Chrome again and check if the issue is now fixed.

New Windows brings new keyboard shortcuts, most of them are tied to new features and we are presenting you some new ones that are worth remembering. ⊞ WINDOWS + N - notification panel ⊞ WINDOWS + W - News and Interests feed With the News and Interests feed, Windows 11 offers users the ability to check the latest news, the weather, and more without opening a browser window. ⊞ WINDOWS + Z - Snap Layout Instead of the usual two windows snapping capability, Windows 11 allow users to snap their windows in a three-column layout. Users can access this by pressing Windows Key and Z to access the Snap layout. ⊞ WINDOWS + PRT SCN - taking screenshots This one isn’t exactly new, but pressing the Windows Key and Print Screen will automatically capture the entire screen and save a copy of the image on your PC. Once the screen flashes, you will know that the screenshot has been taken, after which you can find the file saved under your Pictures folder in a subfolder called Screenshot. ⊞ WINDOWS + C - Microsoft Teams chat Microsoft Teams app, the service allows anyone with a Microsoft account to quickly start a chat using the Windows + C shortcut.

Recently, a number of users reported that they were not able to run PLEX and other similar streaming services ever since a Windows Update was automatically installed in the system. The error in these streaming services has something to do with a missing Mfplat.dll DLL file from the Windows Media Feature Pack. On the other hand, some users also reported that the mfplat.dll error occurred on several games as well which used the Media Feature Pack. Usually, the mfplat.dll error is caused by the missing Media Feature Pack in Windows 10. Although most of the time the Media Feature Pack is installed by the application that needs it or through Windows Update automatically, there are just certain installers that do not have it. It could be that the Media Playback service was disabled by a particular Windows Update. Aside from that, the error might be because your computer is using Windows 10 N – a Windows 10 version that does not include the Media Feature Pack by default. Whatever the cause may be, you can troubleshoot the problem with the help of the options given below. But before you go on, keep in mind that downloading the missing DLL file and copying it to the folder of the program where you encounter the error won’t really help and will only make things even more complicated.

Option 1 – Install the Media Feature Pack for Windows 10 N version

As mentioned, the Windows 10 N version does not come with Windows Media Player. Meaning to say, the Media Feature Pack is also not installed by default or won’t be updated by the Windows Update component. So if you are not quite sure what Windows 10 version you currently have installed, refer to these steps:

• Tap the Windows key + S and then type “about” in the search box.
• From the search results, click on the “About your PC” to open the About tab of the Settings app.
• Afterward, scroll down to the Windows specifications and check your Windows version under Edition.

Note: If you’ve determined that your computer is using the Windows 10 N version, you need to install the appropriate Media Feature Pack for your computer. How? Refer to the steps below:

• Click this link to download and install the Media Feature Pack from Microsoft’s official website.
• Upon installation, select the edition you want to install using the drop-down menu and then click on Confirm. Take note that there are few reasons why you’d want to install the older version since most streaming services like PLEX and most games usually require version 1803.
• After that, wait until the request is validated. The download should begin in a few minutes automatically.
• Once the download is completed, open the installation executable file and follow the next on-screen instructions to install the Media Feature Pack on your computer.
• Restart your computer. After your computer has rebooted, open the application where you’re getting the mfplat.dll missing error and then check if the problem is now fixed.

Option 2 – Enable Media Playback via Command Prompt

If you encounter the mfplat.dll missing error when you attempt to run PLEX or other similar streaming service and you’ve already verified that the Media Feature Pack is indeed installed, you might want to try enabling it using an elevated Command Prompt. There are cases when a particular Windows Update ends up disabling the feature and creates the grounds which results in the mfplat.dll missing error. Thus, you can have to enable the feature via Command Prompt.

• Tap the Win + R keys to open the Run dialog box.
• Then type “cmd” in the field and hit Enter to open an elevated Command Prompt.
• Next, click on Yes if a User Account Control prompt pops up.
• After opening Command Prompt, copy and paste the following command and hit Enter to execute it:

dism /online /enable-feature /featurename:MediaPlayback

• Close Command Prompt and then open the app once again to check if the problem is now fixed.

Option 3 – Try extracting a copy of the mfplat.dll file from the windows.old directory

If you encounter the error shortly after you just upgraded to Windows 10 from an older version, the best thing you can do to resolve the problem is to use windows.old directory to fetch an old copy of the mfplat.dll file. To do so, follow the steps below.

• Go to the Windows drive and then look for the windows.old directory where it preserves a copy of your old operating system as well as associated files in case something goes out of hand during the upgrade process.
• After that, open the windows.old folder and then go to the syswow64 folder.
• Next, from the syswow64 folder, copy the mfplat.dll file and paste it to C: windows syswow64.
• Restart your computer and check if the error is now resolved or not.