How to Fix Error 400

Error Code 0x80070490 - What is it?

When downloading a Windows update, it is important to remember that these updates are what keeps your computer safe. Some users have reported seeing error code 0x80070490 when allowing updates for their Windows PC. This error code may appear when the user is trying to connect to the update site for Windows and maybe a result of a corrupted CBS manifest. Having this error code will not only stop the update of the system, but it will also certainly halt any work being done with the computer. Quite a few Windows users have written in complaints about this error while updating from any prior Windows update to Windows 10.

Common symptoms include:

• While a user is performing the updates, the Windows computer will stop running the updates, and it will show the error code 0x80070490.
• Windows updates will not install any new features and will not install security patches.
• The computer will not continue with the Windows update, and it may revert back to the previous state that the computer was in, prior to attempting the updates.

Error Causes

There is not a lot known about what exactly causes the error code 0x80070490, but it is something critical that makes Windows abruptly stop its updates. It could be caused by a simple glitch in the computer system, or it could be caused by a larger problem. One thought is that the CBS (Component-Based Servicing) manifest can be corrupt. Another thought is that the computer's anti-virus software may be interfering with the computer's ability to perform the necessary updates.

Further Information and Manual Repair

There is very little information known about error code 0x80070490 and why it exists, but there are a few methods in which to correct it. Users should be careful when trying to fix this error themselves. If the user feels that the methods are too complicated or they are uncomfortable taking it on themselves, they should contact a Windows repair technician to fix the problem. Not all methods listed will suit the user's needs, but it is dependent upon the problem at hand as to which method will be the best fit to fix the error code. If these steps are taken and the error is not corrected, it is vital to contact the Windows repair technician.

Method One: Creating a new local account

Create a new local account on the computer, and allow administrator privileges on it. Next, move all of your documents and personal files to the new account. Delete the old account (you will no longer be using this) and switch over to the new one. After switching to the new local account, add the Microsoft account to it.

Method Two: Delete user ID, Store cache from the registry

• You will need to open the Registry Editor. Do this by pressing the Windows Key and R, then typing in “Regedit”. After this is typed in, press Enter or click the OK button to start the registry editor.
• When this starts, you will need to navigate all the way to the following key on the left pane:
• HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionAppxAppxAllUserStore After this, find the key that is similar to this: S-1-5-21-1505978256-3813739684-4272618129-1016
• NOTE: this is just an example. The keys will be in a similar format but will not look exactly like this.
• Select all the keys that look like this, and then delete them. After these keys are deleted, close the Registry Editor and restart the computer.

Method Three: Check to see if BITS, MSI Installer, Cryptographic, and Windows Update Services are running

Press the Windows key and R. Then, type in services.msc. After the Services window starts up, find the following services:  BITS, MSI Installer, Cryptographic, and Windows Update Services. When these services are found, make sure that they are up and running. If one or more of these services is not running, make sure that they are started. To do this, select the service and then click on Start the Service.

Method Four: Windows Update Troubleshooting

Press the Windows key plus W and then type in “troubleshooting”.  Select Troubleshooting. On the top left corner, select View All. Click on Windows Update troubleshooter. After this, follow the on-screen instructions in order to run the troubleshooter. After the troubleshooter has run, the issue should be fixed.

Recent Windows updates have been slowly but surely moved a lot of control panel features into settings. This indicates that in the long term goal is probably to get rid of the control panel altogether. No matter how the setting app is easy to use and good there are still things in the control panel that we need and we will still need until they are all moved in the setting application. There are several ways to open and get to the control panel from run dialog to shortcut keys but one perhaps more convenient and easiest way is to just simply have in file explorer right beside hard drives double click away. In order to place the control panel icon inside file explorer, we will need the help of our old friend: the registry editor. As always playing with the registry editor can cause some instability and it is always a smart thing to back up it first before attempting any kind of edits.

Registry editor adding a key

To open registry editor press ⊞ WINDOWS + R to open the run dialog and inside type in REGEDIT followed by ENTER Once the registry editor is opened locate the following key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\MyComputer Right-click on the NameSpace folder on the left navigation pane and then select New > Key Rename the key with {21EC2020-3AEA-1069-A2DD-08002B30309D} (This CLSID code will add access to the Category view of the Windows 10 Control Panel) or with {26EE0668-A00A-44D7-9371-BEB064C98683} (This CLSID code will add access to the large icons view of the Windows 10 Control Panel) Save and exit the registry editor Now when opened, file explorer will show a control panel icon for easy access.

Stumbling upon downloader.dll not found error is not pleasant to experience, usually, it means that desired application can not be started. There could be several reasons why this error happens from user mistakes, corrupted files, bad installation, and even bad RAM memory. Whatever the reason might be solutions provided are the same for all and offer a fix to this issue. it is advisable to follow provided solutions from start to finish not skipping any one of them since they are tailored to address the simplest solutions and issues and move toward more complicated ones.

1. Reinstall application

   If you are receiving Downloader.dll not found when trying to run just a single certain application, reinstall the application, there is the possibility that the application has somehow corrupted downloader.dll during the installation process. Reinstalling might fix the problem.

2. Run SFC scan

   SFC scan is the tool meant to scan all files and fix any corrupted ones. To run this tool, open the command prompt in administrator mode by right-clicking on the windows start button and then left-clicking on the command prompt (admin). When you are in command prompt type in SFC /scannow and let the whole process finish.

3. Update device driver

   If previous steps have not provided results, go to device manager and visually check is there a device with an exclamation or other sign next to it, if there is, right-click on it and choose update driver.

Error Code 0x8007267C – What is it?

Error code 0x8007267C is specific to Windows 10. This error is triggered when no DNS server is currently configured in your network settings during the Activation process. If you are fairly confident in your ability to address command-line tools and networking issues, you can follow the steps below to try to remedy the error code on your own. If not, you may need to contact a qualified technician in order to resolve the error successfully.

Solution

Error Causes

The cause of Error Code 0X8007267C within the Window 10 system is fairly straightforward. Windows Activation requires a valid DNS server to be configured in order to complete the Activation process; if one is not available or properly configured, then you may see this error code and Activation will fail.

Further Information and Manual Repair

The following methods may help you to resolve this error, but you’ll need to have some familiarity with command-line tools to complete the steps successfully. If these methods do not work or if you are uncomfortable in using the command prompt, you may need to consult a technician to fully resolve this particular error code on the Windows 10 system.

Method 1: Register a DNS server within your network properties and test the connection.

In order to resolve this error code, client connectivity to a DNS server must first be established. The following steps may help you to determine the root problem with your connectivity status:

1. Open a command prompt, after which you'll run IPCONFIG /all
2. Verify the following values: The IP address that has been assigned, the DNS server, the subnet mask, and the default gateway. Compare each to ensure that all are set with the values that correspond to your specific environment
3. Check for basic IP connectivity to the DNS server using the PING command. In using the PING command, utilize the address of the DNS server found in Step 1

ping <DNS Server IP address>

If basic connectivity to the DNS server in question is failing, then you will need to resolve that issue before going further in the process.

After troubleshooting the above basic connectivity issues to the DNS server, you can reattempt Windows Activation by using the command below from within an Elevated Command selection:

cscript windowssystem32slmgr.vbs -ato

If the steps above did not work for you, you may want to try the steps found in method 2.

Method 2: Use phone-based authentication with a MAK (multiple activation key).

If a DNS server is not connected to your network, you can use an alternative method to complete the Windows Activation process. Bypass Method 1 by using a MAK product key instead to activate the volume license installation. Certain MAK product key providers have a variation on the specific key numbers that you will need to use. If you are using TechNet media or MSDN media, you will have to change the product key listed to the product key provided. The product keys provided by either TechNet media or MSDN media for Windows Server 2008 or for Windows Vista Enterprise will be the MAK product key that you will enter in a later step.

Like the previous method, you will need to have some familiarity or confidence in your ability to operate Command Line tools before proceeding. Once you have found your MAK product key, you’ll need to open a command prompt and use the following command to change the product key to match the MAK product key, which should look something like the example below:

            slmgr –ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx-xxxxx

After completing the product key change, use the following command to initiate the phone activation wizard, thereby completing the activation of the system:

            slui 04

The activation wizard should be able to walk you through the remainder of the process in a step-by-step manner. In addition to appearing as an error code in Windows 10, this particular error may apply to multiple versions of Windows, including:

• Windows 7 Enterprise
• Windows 7 Enterprise E
• Windows 7 Enterprise N
• Windows 7 Professional
• Windows 7 Professional E
• Windows 7 Professional N

Steps to address the error code may be different in any of these other versions of Windows. If you have difficulty in resolving the error effectively, seek professional technical help.

Special folders like music, pictures, download, videos, etc, can be placed as shortcuts in the start menu inside Windows 11 for easy access. Shortcuts will appear in the start menu on the bottom as simple glyphs. They are not present in the start menu by default so it needs to be turned ON first. If you want to place these icons in your Star menu follow this step-by-step guide and you will have them in no time.

1. Open Windows settings
2. In settings go to Personalization > Start
3. In Start click on Folders
4. On the given list of Settings, File Explorer, Documents, Downloads, Music, Pictures, Videos, Network, and Personal folder click on the switch beside them if you want them as shortcuts in the Start menu. You can choose whichever you want.
5. Close settings

You can revisit the settings menu to add more icons or remove some of them later if you wish so.

Page Fault in Non-Paged Area is a blue screen error usually happening with faulty drivers but it can come from different issues like faulty RAM. In this short article, we will cover usual ways on how to approach and solve this error.

Solving Page fault in Non-Paged Area

Rollback using system restore

Simple and easy solution, roll back to the previous system restore point where Windows was stable and working.

Fix Page Fault in Non-Paged Area using device manager

1. Press ⊞ WINDOWS + X to open the hidden menu
2. Click on device manager
3. Find a device with a question mark and right-click on it
4. Click on the rollback driver button

Fix via command prompt

1. Press ⊞ WINDOWS + X to open the hidden menu
2. Click on command prompt (admin)
3. Inside command prompt type in SFC / scannow and press ENTER
4. Wait for the process to be finished and then reboot the PC

Fix via DISM tool

1. Press ⊞ WINDOWS + X to open the hidden menu
2. Click on command prompt (admin)
3. Inside command prompt type in DISM /Online /Cleanup-image /Restorehealth and press ENTER
4. Wait for the process to be finished and then reboot the PC

Page fault in Non-Paged Area via a dedicated tool

Sometimes manual and provided solutions just simply cannot cut it because the issue is triggered also with something else and not just a single issue. Use DRIVERFIX to fix this specific issue with a single click.

Error Code 0xc004f034 – What is it?

Error code 0xc004f034 occurs when Windows users are unable to activate their operating system. It affects Windows 8 and Windows 10 users and features common symptoms which include the following:

• Inability to activate Windows
• Message box with error code 0xc004f034

Solution

Error Causes

Error code 0xc004f034 often occurs due to an issue with the Windows product key. This may occur when users enter an invalid product key or use one that is appropriate for use on a different version of Windows. To correct the issue, users will need to use the correct product key for their system or contact an IT professional if their device is connected to a Key Management Service (KMS).  Windows users affected by this error code may also need to check their system for viruses or missing system files since these issues can result in error codes on Windows devices.

Further Information and Manual Repair

Manual repair methods enable users to fix problems related to error codes. Though some manual repair methods require the use of Command Prompt and utility tools like the System File Checker, even non-technical Windows users can find success simply by following the instructions provided below.

However, note that some issues can be complex, thus requiring the use of an automated tool or help from a Windows repair technician. Consider these options if the manual repair methods below do not resolve error code 0xc004f034 on your Windows 8 device.

Method One: Enter Valid Windows Product Key

Microsoft currently offers several ways for customers to activate their Windows operating system, the most common of which is the product key. This 25-character code verifies that users have access to an authorized version of Windows.

You may get a valid product key from an authorized dealer, a new PC with Windows, or access a digital copy from a Windows website when you purchase your Windows operating system online. Once you have a valid product key, use it to activate Windows and resolve error code 0xc004f034 in Windows 8. Follow the steps below to access the Product Activation Wizard.

• Step one: Click or tab Start button then select Settings
• Step two: Tap or click PC Settings, then select Activate Windows
• Step three: Type invalid product key

Once a valid product key is used, the Product Activation Wizard should complete the activation process. If you are unable to complete the process, however, and error code 0xc004f034 remains unresolved, click the link or instructions the Product Activation Wizard provides regarding activation via phone or customer support.

Method Two: Run System File Checker

Another option available to Windows 8 users is System File Checker (SFC). This tool enables Windows users to scan and repair corrupted or missing system files. Follow the steps below to access SFC.

• Step one: Go to Start and type Command Prompt or CMD.
• Step two: Run as Administrator
• Step three: Type sfc /scannow ensuring a space is between “sfc” and “/scannow”.

System File Checker will repair any corruptions found on system files within your machine once you successfully follow the instructions provided. The tool will also replace missing files which will lead to better performance on your PC.

When the process is complete, restart your device then check if you are able to activate Windows. If error code 0xc004f034 is still present, you will need to find another solution via repair method three.

Method Three: Scan for Viruses and other Malware

Viruses and other forms of malware are one of the main issues resulting in poor PC performance and Windows error codes. To fix this issue on your PC, scan your machine for signs of these malicious programs. If you do not have anti-malware software and would like to download one from the Internet, ensure the software you choose is effective before attempting to download it.

Once you have powerful antimalware software on your PC, begin a scan for viruses, Trojan horses, and other forms of malware. If the Windows error code occurred due to issues related to malicious programs, you will be able to resolve the issue. If, however, this manual repair method proves ineffective in resolving error code 0xc004f034, download a powerful automated tool or contact a Windows repair technician to assist you.

Method Four: Use an Automated Tool

If you wish to always have at your disposal a utility tool to fix these Windows 8 and other related issues when they do arise, download and install a powerful automated tool.

Isn’t it annoying when you get an error message pop up stating ‘Cannot find propsys.dll” or “propsys.dll not found” when you start your computer or open a particular program? The propsys.dll file is crucial to the Windows operating system. This file is located in one of the following locations: "C:\Windows", C:\Program Files, C:\WINDOWS\system32, or C:\Program Files\Common Files". And the propsys.dll error indicates that the propsys digital library file is damaged and corrupt. The propsys.dll error may lead to a very unstable operating system. It may also hamper your ability to access many programs on your computer, lead to program and system crash and slow down the system’s performance. Therefore, to avoid these system threats, it is advisable to fix the error immediately.

Solution

Error Causes

The common causes of propsys.dll file error are:

• Registry problem
• The propsys.dll file is damaged due to a virus or spyware
• Improper software removal
• Hardware Failure

The propsys.dll error message is displayed in either of the following forms:

• Propsys.dll not found
• Cannot find [Path]propsys.dll
• This application failed to start because propsys.dll was not found. Reinstalling the application may fix this problem
• The propsys.dll file is missing

Further Information and Manual Repair

There are many ways to fix the propsys.dll error. However, for optimum results from the fix, you must first identify the cause of the error and then choose the solution accordingly.

• Recommended Solution for Registry Issue

If you use your system daily the resulting wasted/invalid/junk entries may dilate the registries. This can result in registry malfunctioning which may result in a propsys.dll error on your screen. When this happens, it is advisable to use a registry cleaner to fix the problem. Registry cleaner helps clean up the junk entries and repairing the corrupted registries. For this, you will first have to download a registry cleaner repair tool. Download and install the software on your computer. After downloading it, click the start scan button to run. This helps scan and diagnose system errors on your computer in seconds. Once the scanning is complete, click on the fix button to repair the registry problem.

• Recommended Solution for File Damage and Corruption

Use the ‘System Restore’ option to restore corrupt and damaged files.  The ‘System Restore’ function will help you get a fresh copy back and simultaneously help fix the error. Here’s how to use and access the ‘System Restore’ function on your computer: Simply go to the start menu and in the search box type restore. Once you type, it will show you the system restore option. Now select ‘choose a different restore point’. After this, you will be presented with a list of restore points. Choose a point that you believe happened before the propsys.dll error. Confirm your selection and restart. Another alternative solution for file damage is to run a virus scan of your entire system; the damage could be related to a virus or malware infection.

• Recommended Solution for Hardware Failure

If a propsys.dll error occurs due to hardware failure, then it is advisable to update the drivers for hardware devices that you think are related to propsys.dll. For example, if you receive the propsys.dll error when you play a 3D video game, then try updating the driver for your video card.

Windows 11 brought with it a simplified right-click menu that has limited options. If you would like to bring the old Windows 10 right-click menu you will have to do some registry tweaking but it is doable. Since this requires registry tweak, please follow given solution step by step

1. Press Start and type RegEdit
2. Click on Registry Editor
3. Inside registry editor find next key: Computer\H_KEY_CURRENT_USER\SOFTWARE\CLASSES\CLSID\
4. Right click in the right part of editor window and select New > Key
5. Type in as a name: {86ca1aa0-34aa-4e8b-a509-50c905bae2a2}
6. Right click on {86ca1aa0-34aa-4e8b-a509-50c905bae2a2} key and select New > Key again to create new key inside this one
7. Name inside key InprocServer32
8. Double click the “(Default)” key in InprocServer32 to open it
9. When the Default key opens close it without making any changes by clicking on OK. This will make its value property Blank instead of value not set
10. Close Registry Editor
11. Restart your PC

Once the system is up if the followed solution is applied you will now have an old school menu once right-click is used.

BSOD or Blue Screen of Death errors are one of the most common errors you can encounter on your Windows PC. One of these BSOD errors is the “ACPI_BIOS_ERROR”. If you suddenly get this error, it means that there is some problem in booting the operating system from your hard drive or Windows was not properly installed on your PC. In addition, this error could also mean that there is something wrong with the CMOS battery located in the motherboard. Unlike other BSOD errors, the workaround for this error is a bit different as these workarounds require a bit more expertise in updating the BIOS as well as setting the correct boot configuration. If you know are capable enough in troubleshooting the problem, refer to the instructions laid out below to fix the BSOD “ACPI_BIOS_ERROR”.

Option 1 – Try to remove the SSD and update the BIOS

The first thing you have to do is to check the primary storage devices on your PC. If you have just installed a new hard drive or SSD recently on your computer, then it’s most likely the cause of the BSOD error. Moreover, you should also ensure that your BIOS is up-to-date to the latest available build.

• Remove the SSD/HDD and inject a different HDD that was already preinstalled in your Windows PC.
• After that, update the BIOS to the latest available build. After updating it, insert the old SSD/HDD and then try to boot your PC again. The problem should be fixed now. If not, refer to the next given option.

Option 2 – Try to check the CMOS battery and reset the CMOS module

As mentioned earlier, the CMOS battery might also be the one that’s causing the problem. It is a physical component of the motherboard and is a memory chip that contains all the settings configuration on your computer and is also powered by a battery. So if your battery loses power, the CMOS will be reset and as a result, all the configurations will be gone as well. It is also possible that the CMOS module is not properly working and every time things are saved, they are properly written due to the battery. That’s why you have to consider changing the CMOS battery and see if it fixes the problem. In addition, you also have to make sure that you completely reset the CMOS module and then try booting your PC again.

Option 3 – Try to check the BIOS settings

If the BIOS settings are incorrect, chances are that’s the reason why you’re getting the “ACPI_BIOS_ERROR” BSOD error. Every BIOS has different settings which you can make use of to enhance your computer experience. So make sure that your BIOS is up-to-date and that the settings are in accordance with your requirement. Another thing you can try is to disable the Legacy USB and the Legacy BIOS in the BIOS settings if you are trying to install a 64 bit Windows version. Make sure that you also enable AHCI before plugging in the installation drive on your PC. Moreover, ensure that your PC is using IDE or Integrated Drive Electronics mode instead of SATA or Serial Advanced Technology Attachment. Aside from that, try to check the extracted setup if it is in NTFS format, if it is, you should extract the ISO in FAT32 and use it to install Windows.

Option 4 – Try to reset the ACPI Compliant Control Method

ACPI or Advanced Configuration and Power Interface provide an open standard that operating systems can use to detect hardware, perform power management, as well as monitor the status of your device and provide information for other processes. Chances are, there are some misconfigurations with this module on your PC that lead to believing that there is no battery present. That’s why you need to reset it and see if it fixes the BSOD error or not.

• Boot your PC into Safe Mode.
• Tap the Win + R keys to open the Run dialog box.
• Type in “devmgmt.msc” in the field and tap Enter to open the Device Manager.
• After opening the Device Manager, go to the “Batteries” section and click it to expand it and then right-click on the “Microsoft ACPI-Complaint Control Method Battery” option and click on Uninstall.
• After you disable the module, click on any empty space and then click the “Scan for hardware changes” option.
• Then check if you can now boot your PC normally and without the BSOD error.