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How to Fix Error 421

What is the Error 421?

Error 421 is a common SMTP (Simple Mail Transfer Protocol) Outlook error message. MS Outlook is one of the best and popular email applications widely used by PC Windows users for sending and receiving emails within and outside workplaces.

It is most commonly used in offices by professionals for faster communication.

This error may occur while sending and receiving emails on the server. The error 421 messages is displayed in either of the following formats:

“An unknown error has occurred: Server error 421”

"Could not send your message. Error 421"

421 4.2.1 : (DYN:T1) http://postmaster.info.aol.com/errors/421dynt1.html

421 4.3.1 Out of disk space for temp file

421 4.3.2 All server ports are busy

421 Downstream server error

421 Fork failed

421 Greylisting enabled, please try later

“An unknown error has occurred. Subject ‘Testing’, Account: ‘pop.charter.net’, Server: ‘mail.charter.net’, Protocol: SMTP, Server Response:

’421 Message rejected’, Port: 25, Secure(SSL): No, Server Error: 421, Error Number: 0x800CCC67”

Solution

Restoro box imageError Causes

Some common causes for this critical Outlook error are:

  • PST storage size exceeds 2GB file size
  • Improper ISP settings
  • Slow internet connection
  • PST file corruption
  • Trojan attack and viral infection

This is a critical Outlook error that should be resolved timely. If you delay, it may cause you a great deal of inconvenience.

The error code 421 hampers your ability to access your email account, send and receive emails, add new contacts, view emails, calendar entries, and journals. In other words, it just brings your email activities to a standstill locking you out of the account.

Further Information and Manual Repair

To resolve this error code on your system, you don’t always have to hire a professional or call the network personnel to do the job. It may be a critical error but the good news is that it is quite easy to fix. Even if you don’t have technical expertise, you can still repair it.

Here are some of the best methods to repair this issue on your system:

1. Change the Server Settings to its Maximum Limit

Try changing your server settings. Here set the inbound connections limit at the maximum limit.

  • To do this, open the Microsoft Exchange Server Administrator utility. The access path of this utility will vary depending on the installation procedure used to set up Exchange Server.
  • Once you open the MS Exchange Server Administrator utility, click the ‘Connections’ icon in the left side navigation pane. Now double click the internet mail service icon in the right side pane. As you click it, the Properties window will open.
  • Now click the ‘Connections’ tab in the Properties window and then click the ‘Advanced’ button. This will open the configuration window.
  • Here reset the number for ‘Maximum Number of Inbound Connections’ to a high number, its maximum limit. After changing the settings, close all open Exchange Server Administrator program windows to successfully complete the process.

After the process is complete, try accessing your Outlook email account again; if it works, then that’s great the error 421 is resolved. However, if it doesn’t, then the problem could be related to viral infection.

2. Download a PST Repair Tool

If the cause of the error is PST files corruption, then not only will you be locked out of your email account, you are also at risk of losing all the data stored in your email account.

However, the best way to resolve the error and ensure full data recovery is to download a reliable PST repair tool. By running a PST repair tool on your system, you can resolve the error 421 right away. It recovers your data, repairs corrupt and damaged PST files.

3. Scan Your PC with Restoro.

If viral infection and Trojans are causing the error 421 to pop up on your system, then it is recommended to download and scan your PC with Restoro.

This is an advanced, intuitive, and user-friendly PC fixer. It is not just an antivirus but also a system optimizer and a registry cleaner.

Unlike common antivirus software that only removes viruses and simultaneously slows down the system’s speed, Restoro removes all types of malicious software on your PC including malware, spyware, Trojans, and viruses, and also boosts the speed of your PC significantly.

It is safe, easy to operate, and a quick fixer. It is compatible with all Windows versions.

Click here to download Restoro and resolve error 421 today!

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Upcoming Windows features for future
It is no secret that Microsoft is trying to keep Windows relevant and that it is trying to make it as good as possible. A new Windows update will bring some interesting stuff in it which well some like it, some not so much. Among various technical and security updates Microsoft will bring some directly visible to each user.

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of these features will be File explorer compact mode. This feature is a sort of spacing content in file explorer giving it easier access if you are using a touch screen device. Now, this feature is somewhat strange, and altho I can understand and get behind the logic of this move I am not sure I like it. Lucky for me and others who feel the same this option can be turned off for now.

Second

feature is something I can get behind, improvements for virtual desktops. There is an article on errortools about virtual desktops feature and I really hope you are using it since it is a great feature. Anyway, new update will bring us separate desktop wallpapers for each desktop and we will be able to arrange them in order we like.

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thing that I would like to address is animation features. We will have windows slowly fade and resize when opened, minimized, maximized, etc. So far we are unable to tell how this can and will it affect overall system performance. I am sure it will have some impact but hopes are that it will be kept to a minimum. If you would like to read more helpful articles and tips about various software and hardware visit errortools.com daily.
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As you know, the Taskbar is one of the integral parts of the Windows desktop and it has been there since the release of Windows 1.0 and up until now with Windows 10. Since then, Microsoft has been modifying the Taskbar with a new design which makes it a home for new features such as Windows Search, Task View, and many more. However, there are times when you may that the Taskbar has disappeared or has stopped responding. If you experience either one of these scenarios, read on as this post will walk you through what you can do to resolve the problem. Here are some suggestions you can check out to resolve the issue with the Taskbar in Windows 10 but before you proceed, make sure that you create a System Restore point first. To do that, follow these steps:
  • In the Start search, type in “create a restore point” and click the entry “System Properties”.
  • Next, select the main system drive under Protection Settings and click on the Configure button.
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Once you’ve created a System Restore point, refer to the troubleshooting steps below to fix the Taskbar in Windows 10.

Option 1 – Try to restart the Explorer process

This may sound really basic but it actually is a proven method to fix the Taskbar issue. So if anything gets stuck on the system tray or the Taskbar, you can always fix it by restarting the explorer.exe. How? Refer to these steps:
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  • After opening the Task Manager, go to the Processes tab and look for the process named “Windows Explorer”.
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Option 2 – Unhide the Taskbar using the Settings app

It is possible that the Taskbar could be hidden so you can try to unhide it using the Settings app.
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  • After that, go to Personalization > Taskbar.
  • From the main section, make sure that the “Automatically hide the task in desktop mode” is toggled to the off position. However, if it’s already off then proceed to the next options below.

Option 3 – Make sure that you are not in Tablet Mode

Since Windows 10 is designed to work on both desktop and mobile devices, it could be that your computer has slipped into Tablet Mode which explains why you’re not seeing the Taskbar. To check if your computer is really in Tablet Mode, follow these steps:
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  • Next, select the System setting and from the left pane select the Tablet Mode.
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    • Automatically hide the taskbar in tablet mode

Option 4 – Try to check the Projection Settings

You might also want to check the Projection settings as it could be the reason why Taskbar has disappeared.
  • Tap the Win + P keys to open the Windows Projection settings.
  • Next, make sure that you select the “PC screen only” option and then check if your Taskbar has now appeared or not.
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There are times when we delete a system files without meaning to on your Windows 10 computer. This happens a lot for users sometimes mistake a system file for a malware-laden file or junk file when it’s actually a system file from the System32 or SysWOW64 folder. In such cases, it could affect your computer. For instance, you might not be able to reboot your PC or open Settings. If you have removed system files from any of these folders by accident and you desperately want to restore them, read on, as this post will guide you in resolving the problem. Restoring them isn’t actually hard, just make sure that you have system admin access. The good thing is that there exists Windows Resource Protection which protects registry keys and folders and even critical system files. So if there are any detected changes to a protected system file, the modified file is restored from a cached copy located in the Windows folder. However, if the Windows Resource Protection program fails to restore these files, you need to check out the given fixes below.

Option 1 – Run System File Checker scan

To restore the system files you deleted, you can try running System File Checker or SFC scan. System File Checker is a command utility built into your computer that helps restore corrupted files and missing files. Refer to the following steps to run it:
  • Boot your PC into Safe Mode.
  • Hit the Win + R keys to launch Run.
  • Type in cmd in the field and tap Enter.
  • After opening Command Prompt, type in sfc /scannow
The command will start a system scan which will take a few while before it finishes. Once it’s done, you could get the following results:
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  2. Windows Resource Protection found corrupt files and successfully repaired them.
  3. Windows Resource Protection found corrupt files but was unable to fix some of them.
  • Reboot your computer.

Option 2 – Try to run the DISM tool

Aside from System File Checker, you can also run the DISM or Deployment Imaging and Servicing Management Tool as it could help in restoring the system files on your Windows 10 computer. Using this built-in tool, you have various options such as the “/ScanHealth”, “/CheckHealth”, and “/RestoreHealth” which could help you resolve the problem.
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Option 3 – Try performing a System Restore

Running System Restore can also help you bring back the system files. You can do this option either by booting into Safe Mode or in System Restore. If you are already in the Advanced Startup Options, just directly select System Restore and proceed with the next steps. And if you have just booted your PC into Safe Mode, refer to the steps below.
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  • After that, follow the on-screen instructions to finish the process and then restart your computer and check if the problem is fixed or not.

Option 4 – Try to run Automatic or Startup Repair

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Option 5 – Reset your computer

  • Tap the Win key or click on the Start button located in the Taskbar.
  • Then click on the Power button at the bottom right portion of the screen.
  • Next, press and hold the Shift key on your keyboard and then click on Restart. This will restart your Pc into the Advanced Startup options.
Note: Once you have access to the Advanced Startup options, you have to go to the setting which allows you to Reset your Windows 10 PC. All you have to do is select Troubleshoot > Reset this PC to reach the following screen Afterward, select either the “Keep my files” option and then proceed to the next on-screen instructions that follow to reset your Windows 10 computer without losing your files.
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Option 1 – Delete the file using Command Prompt

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Option 2 – Use a Command Prompt tweak to rename the file

If you don’t want to delete the file and only want to rename it, you can apply some tweaks using the Command Prompt. Make sure to follow the steps carefully.
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  • After inputting the command, tap Enter on your keyboard and then use the set of commands given below. Note that each command is a new line so you need to tap Enter after copying each line.
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Option 3 – Use Command Prompt to delete the file without any extension

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  • Don’t forget to tap Enter right after each command and then use the next command below so you can delete the affected file which has no extension:
del *.*
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Option 4 – Try using another workaround without using Command Prompt

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  • After that, delete the archive file as well.
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Prompted For A Product Key – What Is It?

Some Windows 7 or Windows 8/8.1 users are having a hard time upgrading to Windows 10 as they are being prompted for a product key. By default, the Windows 10 operating system does not require a product key and users should not be prompted for one, given you upgraded your computer from an activated Windows 7 or Windows 8/8.1 license or from the Windows 10 Preview build. However, there are some users encountering this problem and there are several reasons for this.

Solution

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There are a few reasons why some users are being prompted for a product key when upgrading to Windows 10:

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Further Information and Manual Repair

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Now, if ever you’re prompted for a product key when you’re upgrading to Windows 10, you can apply the following methods:

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If you’ve been prompted for a product key upon upgrading to Windows 10, you should click on the “Do this later” option. Wait for a few days then Windows 10 will get activated automatically.

Method Two: Download A Copy of Windows 10 Corresponding Your Current System

One of the reasons Windows users are being prompted for a product key when upgrading to Windows 10 is that they have downloaded a wrong edition of Windows 10 and do not correspond with your current system.

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  • Users of Windows 7 Ultimate, Windows 7 Professional, Windows 8.0 Pro, and Windows 8.1 Pro should download Windows 10 Pro ISO.

NOTE: Users of Windows 7 Enterprise, Windows 8.0 Enterprise, and Windows 8.1 Enterprise are not eligible for the free upgrade offer.

Method Three: Ensure Windows Is Activated

If your Windows 7 or Windows 8/8.1 is not genuine or activated, you will get prompted for a product key. You need to make sure first your current system is activated.

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Method Three: Reset License Status

  1. Press on Windows key + X.
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  5. Input the product key by following the instructions given.

Method Four: Force Activation

  1. Press on Windows key + X
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  4. Exit Command Prompt then restart your PC.

Method Five: Run System File Checker

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Method Six: Contact Microsoft Activation Center

If in case you’ve exhausted all your resources and you are still being prompted for a product key when upgrading to Windows 10, you can try contacting the Microsoft Activation Center for further details. Check here for the appropriate telephone numbers to contact.

Method Seven: Download An Automated Tool

If you still experience the error after doing the methods above, you might want to try a powerful and trusted automated tool to fix the job.

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Option 1 – Try to recreate the Windows 10 installation USB

Recreating the Windows 10 installation USB might help in fixing the problem. You can use a USB drive to do so but make sure that it has a great read-write speed. Follow the steps below to recreate Windows 10 installation USB”
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  • Next, click the “Use the tool to create installation media (USB flash drive, DVD, or ISO file)…” option and follow the next given instructions on the screen.
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  • Next, go to the location where you’ve downloaded the ISO file.
  • Then right-click on the Windows 10 ISO file and select the Open with option and then select File Explorer.
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Option 2 – Try turning off the Internet connection at a specific time

You might want to turn off your internet connection at a specific time. This option can be quite tricky so what you need to do is to disconnect the internet connection when the update is downloaded using the Windows Upgrade tool. It’s actually okay since all the files you need would be downloaded safely and the Windows Upgrade tool will be the one to install the newer updates using those files.

Option 3 – Try to get a newer version of the Windows Media Creation tool

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Option 4 – Run the Windows Update Troubleshooter

Running the built-in Windows Update troubleshooter is one of the things you can first check out as it is known to automatically resolve any Windows Update or upgrade errors like error code 0x800701E3. To run it, go to Settings and then select Troubleshoot from the options. From there, click on Windows Update and then click the “Run the troubleshooter” button. After that, follow the next on-screen instructions and you should be good to go.

Option 5 – Try running Disk Cleanup

You might want to run the Disk Cleanup utility as it is a useful tool that could delete temporary and useless files in your computer.
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The Extended Attributes Are Inconsistent Error
One of the most critical errors inside your Windows operating system is The Extended Attributes Are Inconsistent error. This error means that your operating system has been corrupted and it may produce many annoying issues like for example time lags, random crashes, and even freezing of the system when running multiple applications. There are a lot of reasons for this error, from the registry to faulty application installations to sometimes even hardware issues like bad RAM memory or bad hard drive. Mostly issue is due to corrupted files inside Windows and most often people only think that resetting the PC or complete reinstallation is the only way to fix this problem. Although reinstalling the system or resetting the PC will solve this error for sure there are other less time-consuming ways to fix this error. The Extended Attributes Are Inconsistent ErrorIn this guide, we will show you common ways in fixing Extended Attributes are inconsistent errors inside your Windows that are easy to do and less time-consuming than complete reinstallation of the system.

Fixing Extended Attributes Are Inconsistent error

Run SFC scan

  1. Press ⊞ WINDOWS + X to open the hidden menu
  2. Click on command prompt (admin)
  3. In command prompt type in SFC /scannow and press ENTER
  4. Wait for the operation to complete
  5. Reboot your PC

Use System Image Repair Tool

  1. Press ⊞ WINDOWS + X to open the hidden menu
  2. Click on command prompt (admin)
  3. In command prompt type in Dism /Online /Cleanup-Image /RestoreHealth and press ENTER
  4. Wait for the operation to complete
  5. Reboot your PC

Change all user accounts to the administrator

  1. Press ⊞ WINDOWS + R to open the run dialog
  2. Type in netplwiz and press ENTER
  3. Select a first user account and click on Properties
  4. Click on the Group Membership tab
  5. Choose Others from the options
  6. Select administrator (if all accounts are already administrators change all to users)
  7. Repeat process for all other accounts
  8. Click OK to save settings

Change Windows Sound scheme to default

  1. Right-click on the sound icon in the taskbar
  2. Click on Sound options
  3. Go to the Sounds tab
  4. In Sound Scheme click and choose Windows Default
  5. Under Program Events choose Windows User Account Control
  6. Click on the drop-down menu and choose None
  7. Click on Apply
  8. Click on OK

Downgrade the Sound driver

  1. Press ⊞ WINDOWS + X to open the hidden menu
  2. Click on Device Manager
  3. Find your Audio driver and right-click on it
  4. Click on uninstall and then on OK
  5. Reboot your system

Do System Restore

If none of the provided solutions have worked, perform a system restore to the last point where everything was working fine.

Reset PC

If even system restore has not solved the issue or you do not have valid point in system restore time, perform Reset this PC and hopefully, the error will be finally fixed.

Conclusion

If all of the provided methods have not managed to repair this error that checks your hardware, your computer might have some faulty components if after complete PC reset error persists.
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What Is 0x000000D1 Error?

Error code 0x000000D1 is a serious error that is displayed when Windows automatically shuts down to protect the system against further damage.

Usually, when this error occurs, the message displayed to the users states something like STOP 0x000000D1 DRIVER_IRQL_NOT_LESS_OR_EQUAL.

Solution

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Usually, the STOP 0x000000D1 error code is caused by issues like incompatibilities, third-party drivers, driver conflicts, outdated drivers, malicious drivers, and other related problems.

Speaking technically, the message displayed to the user actually means that the kernel-mode driver has tried to gain access to memory at an unreasonably high process IRQL.

If left unfixed, STOP 0x000000D1 error can become quite serious. Increased frequency of occurrence may not only lead to data loss but can cause system corruption as well. That’s why it is crucial to fix it and to resolve the underlying issues causing it as soon as possible.

Further Information and Manual Repair

There are different ways of quickly fixing this error, some of which are briefly listed below as follows.
  • The solution advised for advanced users is to start the system and log on to it as the administrator. Then do to Start button. Click on All Programs -> Accessories-> System Tools->  System Restore. Here you will find the option, “Restore my computer to an earlier time”. Click on it and select ‘Next’. A list of restore points will appear in front of you. Select the latest restore point and then click on ‘Next’. The confirmation window will appear again. Click on the Next button again. Restart your computer. Congratulations, you have successfully restored your computer.
  • Another way that’s more suitable for novice users goes as follows. Download a repair utility tool. Now install the program. You are most likely to come across a Scan button. Once that happens, choose the Fix/Repair button. Your scan will be completed. The error will be removed. You can then restart your computer again to ensure the error is no longer displayed.
Some other suggestions to keep your computer from encountering these problems in the future are outlined below.
  • Update all your drivers. Obsolete or old hardware or software drivers may also trigger this STOP 0x000000D1 error.
  • If you have recently installed or modified a driver or hardware and the error has occurred afterward, it is highly likely that the installation or modification has caused it. Revert back to the original settings to steer clear of this driver in the future.
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Fixing SYNTP.SYS Blue Screen error in Windows
What is SYNTP.SYS file? it is a system file created by Synaptics Touchpad drivers that are responsible for all the gestures and tracking users’ touch on the Touchpad. However, what happens when this driver fails? Well, it’s either that your touchpad will partially stop working or it will completely stop working at all. And in such cases, you will encounter the SYNTP.SYS Blue Screen error along with any of the following error codes:
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  • KMODE_EXCEPTION_NOT_HANDLED
  • INVALID_PROCESS_ATTACH_ATTEMPT
To resolve the problem, use the instructions given below as a reference.

Option 1 – Run the Memory Diagnostic Tool to check for Memory leaks

  • Tap the Win + R keys to open Run and type exe and hit Enter to open the Windows Memory Diagnostic Tool.
  • After that, it will give two options such as:
    • Restart now and check for problems (Recommended)
    • Check for problems the next time I start my computer
  • Once your computer has restarted, perform a basic scan or you could also go for the “Advanced” options such as “Test mix” or “Pass count”. Simply tap the F10 key to start the test.
Note: After you select the option, your PC will restart and check for memory-based issues. If it finds any issues, it will automatically fix them and if there’s no issue found, then it’s most likely not a memory-based issue so you should try the other options given below.

Option 2 – Try reinstalling the Synaptics Driver

You might want to reinstall the Synaptics driver to resolve the SYNTP.SYS Blue Screen error.
  • Tap the Win + R keys to open the Run dialog box.
  • After that, type “appwiz.cpl” in the field and hit Enter to open the Programs and Features section in the Control Panel.
  • Next, you have to look for the “Synatics Point Device driver” and right-click on it, and then click on Uninstall to remove it from your computer.
  • Restart your PC and then check for updates under the Windows Update section.
  • After that, it will find the latest available and stable Synaptics driver and then install it.
  • Then click the “Check or Updates” under the Windows update section and it will automatically look for the latest available Synaptic driver and install it for you.
  • Now restart your PC and for the changes to take effect.

Option 3 – Try to run a System File Checker scan

You can also try to run a System File Checker or SFC scan in order to scan your computer for corrupted files that might be the cause behind the Error 0x80000003. Once it finds any corrupted system files, it will automatically fix them. To run System File Checker, here’s what you have to do:
  • Tap Win + R to launch Run.
  • Type in cmd in the field and tap Enter.
  • After opening Command Prompt, type in sfc /scannow
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:
  1. Windows Resource Protection did not find any integrity violations.
  2. Windows Resource Protection found corrupt files and successfully repaired them.
  3. Windows Resource Protection found corrupt files but was unable to fix some of them.
  • Restart your computer after the scan is completed.

Option 4 – Perform a System Restore

Performing System Restore might help you in fixing the SYNTP.SYS Blue Screen error. You can do this option either by booting into Safe Mode or in System Restore. If you are already in the Advanced Startup Options, just directly select System Restore and proceed with the next steps. And if you have just booted your PC into Safe Mode, refer to the steps below.
  • Tap the Win + R keys to open the Run dialog box.
  • After that, type in “sysdm.cpl” in the field and tap Enter.
  • Next, go to the System Protection tab then click the System Restore button. This will open a new window where you have to select your preferred System Restore point.
  • After that, follow the on-screen instructions to finish the process and then restart your computer and check if the problem is fixed or not.

Option 5 – Try to run the CHKDSK utility

Running the CHKDSK utility might also help you resolve the SYNTP.SYS errors. If your hard drive has issues with integrity, the update will really fail as the system will think that it’s not healthy and that’s where the CHKDSK utility comes in. The CHKDSK utility repairs hard drive errors that might be causing the problem.
  • Open Command Prompt with admin privileges.
  • After opening Command Prompt, execute the following command and hit Enter:
chkdsk /f /r
  • Wait for the process to be completed and then restart your computer.

Option 6 – Use the Blue Screen Troubleshooter

The Blue Screen troubleshooter is a built-in tool in Windows 10 that helps users in fixing BSOD errors like SYNTP.SYS Blue Screen error. It can be found on the Settings Troubleshooters page. To use it, refer to these steps:
  • Tap the Win + I keys to open the Settings panel.
  • Then go to Update & Security > Troubleshoot.
  • From there, look for the option called “Blue Screen” on your right-hand side and then click the “Run the troubleshooter” button to run the Blue Screen Troubleshooter and then follow the next on-screen options. Note that you might have to boot your PC into Safe Mode.
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Reasons to Defrag Hard Drive
Hello and welcome to our Reasons to Defrag Hard Drive. You ought to defrag your hard drive, in case your PC is slow. This could enhance the efficiency and pace of your PC too as its hardware longevity. It places them where there is space, whenever your PC saves files. Often files are separated into bits. For example, whenever you remember a file and focus on it, it frequently doesn't fit back in exactly the same physical place. Where it can your PC divides up the file, occasionally into several parts, and saves it.

Why defrag?

Fragmentation causes difficulties that doing a defrag can correct. Fragmented files because it requires more resources and time to locate and remember these files slow down your pc. Applications may also take longer to load. Defragging can prolong the life span of the components. A defragged hard disk too can raise your likelihood of recovering lost information. Once fragmentation starts, it can propagate fast -- demanding defragging. It's like the pages of a publication are divided and hidden in several locations around a house, if a file is fragmented. It's like the pages of the book being brought back together, should you defrag. Defragging discovers all the bits of the file and places them in contiguous, actual places.

How will you defrag?

To defrag your hard drive, you must utilize software or utility. There are lots of defragging tools available. SpeedyPC Pro, a whole package of cleaning and optimization tools, can defragment your PC. Before you defrag, it's best to assess your hard drive. This evaluation finds if a defrag is needed and how much of the disc is fragmented. You simply allow the application do the work if it's determined that you must defrag your PC to enhance performance. To be able to defrag a drive, free disk space will be required by your PC. Defragging can take a while. How long depends on several variables, such as the system resources accessible, the disc volume, the number of files, and how fragmented the files are. It's a great idea to defrag when you don't have to use your pc or it isn't doing other jobs. For example, the night could become a great time to defrag. Be certain to close out of resource-intensive applications, like your antivirus scanner, before you defrag.
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