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How to Fix the Error 550

Error 550 - What is it?

Error 550 is an SMTP (Simple Mail Transfer Protocol) outgoing server error code.

It usually occurs when you try to send emails through your Outlook account and the email message encounters a relay error. The email returns back without being delivered with a 550 error message.

The error message is prompted as either of the following:

"550 Requested action not taken: mailbox unavailable"

"550 5 2 1 mail from refused spam site"

In other words, the error code 550 means that your SMTP server was not able to deliver the sent email to the user.

Solution

Restoro box imageError Causes

There are multiple reasons for this error message including:

  • The email address was typed incorrectly
  • Incorrect SMTP Server settings
  • ISP placing restrictions for outgoing mails on the email server
  • System infected by virus or malware

Further Information and Manual Repair

Regardless of what the reason may be for the error 550 code occurrence, it is advisable to repair and fix the issue quickly to avoid inconvenience.

You may not be able to send emails from your Outlook account if the error continues. This can cause great hassle in corresponding with others timely and may create a big communication gap.

Here are some quick and efficient ways to resolve this issue on your system:

Solution 1:

There is no need to panic when you encounter error 550. Sometimes the error message may occur because you inserted the wrong/ incorrect email address of the recipient.

In such a case, cross-check the recipient’s email address to verify if it is correct. If not, insert the correct address and try sending the email again.

Solution 2:

If the error still persists, try other methods to resolve it. Sometimes error 550 can also occur due to incorrect SMTP settings.

Fix it to resolve the error. This can be done by opening your Outlook settings Tools and Accounts option. Now go to view/change the email account for the email account you are having problems with.

After that check, the SMTP server is set to mail.yourdomain.com. Then click more settings and then click the outgoing server tab. See if the ‘My server requires authentication for the outgoing server’ is checked. If not, then check on it. Then simply save to confirm changes. Now try emailing again.

Hopefully, this will resolve the issue.

Solution 3:

Another reason for the error occurrence can be ISP blockage.

When the junk email volumes increase, network administrators (the people who are responsible for managing ISP servers) place restrictions on SMTP email servers to prevent spam on their network. If this is the reason, contact your ISP administrator to resolve the issue.

Solution 4:

Malware and viral infection can also be the cause for error 550. To remove all kinds of viruses including Trojans and spyware and fix the issue right away without compromising on the speed of your PC it is advisable to download Restoro.

This is a highly functional and advanced PC Fixer embedded with multiple utilities like a powerful antivirus and a system optimizer.

It scans your entire PC in seconds, detects and removes all kinds of viruses. Simultaneously, the system optimizer feature ensures the speed of your PC does not slow down during the scanning and virus removal process.

This feature boosts your PC speed significantly.

It is user-friendly and has easy navigations making it quite simple for even those users who are not technically sound to work around it and operate it with ease. It is compatible with all Windows versions.

Click here to download Restoro and resolve the error 550 messages today!

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There is No Sleep Option in Power Menu
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Option 1 – Check the Power settings

As mentioned, one of the reasons why the Sleep option is missing could be the power settings in your computer. To check this possibility, make sure that you’ve enabled the sleep mode in the Power options setting window. How? Refer to these steps:
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Option 2 – Modify the Local Group Policy

If the Power setting isn’t the cause of the problem, then you might want to check the Local Group Policy and modify it. There is a dedicated policy for showing the sleep option in the power menu and if this policy is disabled, then it’s no wonder why you don’t see the sleep option in the power menu. To change this policy, refer to the steps below.
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Option 3 – Try to turn on Standby

Standby, also known as InstantGo, is a feature in Windows 8 and 10 that allows users to maintain network connectivity after a computer has been put into sleep mode. Thus, if this feature is disabled, it can cause the Sleep option to disappear from the power menu. To turn it on, follow these steps:
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Option 4 – Try to install a Video Card driver

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Option 1 – Try to run the Power troubleshooter

As pointed out, the Power troubleshooter can help you resolve any issues your battery might have automatically. It plans and detects system settings that can affect power usages like timeout and sleep settings, display settings, and screensavers and restores them to their default settings. To run this troubleshooter, follow these steps:
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Option 2 – Restore the default settings of the Power plan manually

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Solution

Restoro box imageError Causes

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Further Information and Manual Repair

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KMODE_EXCEPTION_NOT_HANDLED – What is it?

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Solution

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Further Information and Manual Repair

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After troubleshooting, below you’ll find a few solutions to rectify the issue.

Method 1 – Check The Cause of The BSOD Error

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You might also find it useful to check the System Log available in the Event Viewer for other error messages that can help you figure out the driver or device that’s causing the error. Running hardware diagnostics can also be useful.

Method 2 – Disable (or preferably uninstall) Software Before Upgrading

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Method 3 – Disable/Disconnect From Hardware

If you’re connected to any general USB devices (such a smart card reader), disable it. If your computer is connected to other external devices, disconnect all of them. Examples of this include gaming controllers, printers, external hard disk, USB keys, and other non-essential devices).

Method 4 – Other Troubleshooting Steps

Other troubleshooting steps include:

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  • If you’re connected to a domain while trying to set up Windows 10, disconnect and use a local account.
  • If you’re using a SCSI hard disk, connect a thumb drive with the drivers for your storage device. While Windows 10 is setting up, click on the Custom Advanced Option. Using the thumb drive, use the Load Driver command to load the SCSI drive.
  • Another possible cause of this error is due to BIOS incompatibility. BIOS issues can be solved by upgrading your version of your system BIOS. If you don’t know how to do this, refer to your BIOS manufacturer’s website.

Method 5 – Use A Trusted 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 run the installer in Compatibility mode

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Option 2 – Try to troubleshoot compatibility

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Option 3 – Try to enable the Windows Identity Foundation

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Option 1 – Restart or reset your modem or router

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Option 2 – Restart Cortana

Restarting Cortana can help you resolve the issue.
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  • Then go to the File tab and select “Run new task”.
  • After that, type in “cortana.exe” and press Enter to restart the process.

Option 3 – Try to remove Proxy

Removing the Proxy might also help you in fixing the connection issue in Cortana. Here’s how you can do it:
  • Tap the Win + R keys to open the Run dialog box.
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  • After that, go to the Connections tab and select the LAN settings.
  • From there. Uncheck the “Use a Proxy Server” option for your LAN and then make sure that the “Automatically detect settings” option is checked.
  • Now click the OK and the Apply buttons.
  • Restart your PC.
Note: If you are using a third-party proxy service, you have to disable it.

Option 4 – Open another app that uses a Microsoft account

This might seem like an odd fix, however, a couple of users tried doing this and it worked for them as it allowed Cortana to connect to the internet again. In this option, you just have to launch another app that uses your Microsoft account information in the same way as Cortana, for instance, the Store app. Once you open the app, a prompt should appear along with a dialog box that allows you to update your Microsoft account with the information required. After that, restart your computer and check if Cortana is now able to connect to the internet or not.

Option 5 – Verify your Microsoft account

In some cases, Cortana might not be able to connect to the internet because your Microsoft account is no longer verified. This usually happens when you use a two-step authentication system with your Microsoft account. To verify it, just open Settings and click on Accounts. After that, check if you have a Verify hyperlink under your Microsoft account or not then click on Verify. Afterward, follow the next on-screen prompts to verify your Microsoft account. Once your account is verified, restart your computer.

Option 6 – Reset Cortana settings

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  • Restart your PC.
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Option 1 – Try to run the Search and Indexing troubleshooter

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Option 2 – Restart Cortana’s process in the Task Manager

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Option 3 – Try resetting Cortana

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  • Restart your PC.
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Option 4 – Try running the DISM tool

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  • Open the Command Prompt with admin privileges.
  • Then type in the following commands and make sure to hit Enter right after you type each one of them:
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    • Dism /Online /Cleanup-Image /ScanHealth
    • exe /Online /Cleanup-image /Restorehealth
  • Do not close the window if the process takes a while as it will probably take a few minutes to finish.

Option 5 – Try to reinstall Cortana

If none of the options given above works, you must consider reinstalling Cortana.
  • First, right-click on the Start button and click on the Windows Powershell (Admin) option from the list.
  • Next, type the following command and hit Enter to execute it:
Get-AppXPackage -Name Microsoft.Windows.Cortana | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)AppXManifest.xml"}
  • Restart your computer and check if Cortana is now able to connect.

Option 6 – Try troubleshooting the problem in a Clean Boot State

There are instances that some conflicting programs installed in your computer might be the one that’s causing some issues with Cortana or causing the SearchUI.exe process to stop. To identify which program is causing the problem, you need to put your computer in a Clean Boot State. To do so, follow the steps below.
  • Log onto your PC as an administrator.
  • Type in MSConfig in the Start Search to open the System Configuration utility.
  • From there, go to the General tab and click “Selective startup”.
  • Clear the “Load Startup items” check box and make sure that the “Load System Services” and “Use Original boot configuration” options are checked.
  • Next, click the Services tab and select the “Hide All Microsoft Services” check box.
  • Click Disable all.
  • Click on Apply/OK and restart your PC. (This will put your PC into a Clean Boot State. And configure Windows to use the usual startup, just simply undo the changes.)
  • From there, start to isolate the problem by checking which one of the programs you installed recently is the root cause of the problem.
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How to Fix Error Code 0xC004C770

Error Code 0xC004C770 – What is it?

If the Error Code 0xC004C770 popped up on your computer during your activation of the Windows 10 software, don’t worry. This is a fairly common error, especially for people who own more than one computer upon which Windows 10 is installed and activated. The gist of this error code is that the product key that you have entered has already been claimed or used on a different computer. Because there are limitations on the number of computers that can use any given license activation code or product key, this error code can arise when you have exceeded that limit. If you have a single-use license and have already entered the particular product key onto another machine, you may see this error come up during activation.

Both Error Code 0xC004C770 and Error Code 0x803FA071 arise from the same problem and the same steps can be used to resolve both error codes.

Solution

Restoro box imageError Causes

Error Code 0xC004C770 is likely to appear on your screen during activation of Windows 10 if you or anyone else in your organization have already entered in the product key used on another computer. If you have a multiple-use license, the product key that you are entering may already have been used for the maximum number of computers allowed under that license.

Further Information and Manual Repair

There are two basic methods for addressing the issues associated with Error Code 0xC004C770. These methods can easily be implemented by anyone who is comfortable interacting with the Windows Store from their computer, which makes the resolution of this particular error code fairly simple and straightforward.

If you are unable to complete the steps below or Error Code 0xC004C770 has not been resolved after following the guides below, contact a Windows technician who is familiar with the Windows 10 activation process to assist you in the process. You can also get in touch with the Windows technical support team to assist you in the process if needed.

Method One: Purchase A New Product Key from Windows

If you have already used the product key on another computer or have used it on the maximum number of allowed devices, you may need to purchase an additional product key for the computer with Error Code 0xC004C770. Product keys can be purchased physically from a retailer that sells Windows 10 software licenses or purchased directly from the Windows store.

To purchase a new product key directly from the Windows Store, follow the steps below:

  • Step One: Select the Windows start button at the bottom of your toolbar. Click on “Settings,” then select the option for “Update and Security.”
  • Step Two: Click on the “Activation” option.
  • Step Three: In the menu that appears, choose the option to “Go to Store” and follow any on-screen instructions to finalize a purchase of the Windows 10 software and product key.
  • Step Four: Use the new product key to complete the installation and activation of the Windows 10 software on your computer.

If you are unable to see the “Go to Store” option when you reach the “Activation” page, you may not be set as an administrator of your machine. In this case, get in touch with the support personnel from your company to complete the purchase, installation, and activation process on your computer.

Method Two: Attempt to Finish Activation via Phone

For users who have changed out parts of their computer’s hardware, like putting in a new motherboard or activating a new hard drive, you may have more success if you attempt activation through a phone.

In order to activate your copy of Windows 10 from your phone, follow the steps below:

  • Step One: On your mobile device, open up the search box from the taskbar.
  • Step Two: In the search box, enter the phrase “SLUI 04.”
  • Step Three: Select the “SLUI 04” option that appears.
  • Step Four: Follow the directions given on the screen to complete the activation process for your copy of Windows 10.

As with any error code resolution, if the methods above are not successful or if you are not comfortable with your ability to successfully complete the steps above, get in contact with a qualified professional who is trained in the Windows 10 activation process to assist you or download a powerful automated tool to get the job done.

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Fix Installer encountered an error 0x800f0905

Are you trying to update your Windows 11 OS and are receiving a 0x800f0905 error? Do not sweat and do not worry we have a couple of solutions that you can try in order to fix this issue. How this error is tied to various things like misconfigured settings, corrupt system files, and more there is no way to present one simple solution that will solve everything in one click.

error 0x800f0905Therefore we are presenting a couple of solutions that will fix your issue, it is advisable to follow them as presented since they will go from the most common to the more complex one.

Run the troubleshooter

The most common fix and one that will actually repair things most of the time is simply running the Windows Update troubleshooter.

  1. Press ⊞ WINDOWS + I to open the Settings app
  2. Click on System on the left
  3. Click on Troubleshoot in the right part
  4. Click on Other Troubleshooters
  5. Find the Windows Update section and click on Run
  6. Let troubleshooter finish

Reset Windows update components

If the previous solution did not work we will need to do things manually. Follow the steps as presented in order to reset Windows update components.

  1. Press ⊞ WINDOWS + S to open search
  2. Type in Terminal
  3. Select Run as administrator
  4. Click on Yes on the User account control (UAC) pop up
  5. Press CTRL + SHIFT + 2 to open Command prompt
  6. Inside command prompt type each line of a command followed by ENTER after each line:
    net stop bits
    net stop wuauserv
    Del “%ALLUSERSPROFILE%Application DataMicrosoftNetworkDownloaderqmgr*.dat”
    Ren %Systemroot%\SoftwareDistribution\DataStore DataStore.bak
    Ren %Systemroot%\SoftwareDistribution\Download Download.bak
    Ren %Systemroot%\System32\catroot2 catroot2.bak
    exe sdset bits D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)
    sc.exe sdset wuauserv D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)
    cd /d %windir%\system32
    regsvr32.exe atl.dll
    regsvr32.exe urlmon.dll
    regsvr32.exe mshtml.dll
    regsvr32.exe shdocvw.dll
    regsvr32.exe browseui.dll
    regsvr32.exe jscript.dll
    regsvr32.exe vbscript.dll
    regsvr32.exe scrrun.dll
    regsvr32.exe msxml.dll
    regsvr32.exe msxml3.dll
    regsvr32.exe msxml6.dll
    regsvr32.exe actxprxy.dll
    regsvr32.exe softpub.dll
    regsvr32.exe wintrust.dll
    regsvr32.exe dssenh.dll
    regsvr32.exe rsaenh.dll
    regsvr32.exe gpkcsp.dll
    regsvr32.exe sccbase.dll
    regsvr32.exe slbcsp.dll
    regsvr32.exe cryptdlg.dll
    regsvr32.exe oleaut32.dll
    regsvr32.exe ole32.dll
    regsvr32.exe shell32.dll
    regsvr32.exe initpki.dll
    regsvr32.exe wuapi.dll
    regsvr32.exe wuaueng.dll
    regsvr32.exe wuaueng1.dll
    regsvr32.exe wucltui.dll
    regsvr32.exe wups.dll
    regsvr32.exe wups2.dll
    regsvr32.exe wuweb.dll
    regsvr32.exe qmgr.dll
    regsvr32.exe qmgrprxy.dll
    regsvr32.exe wucltux.dll
    regsvr32.exe muweb.dll
    regsvr32.exe wuwebv.dll
    netsh winsock reset
    net start bits
    net start wuauserv

Well, that was a lot of typing or copy and pasting line by line followed by ENTER after each one but hopefully, your issue is solved. These provided solutions fixed most users' issues with this error but if for some reason this is not the case for you, move to the next step.

Run the SFC scan

If you are still having 0x800f0905 error after previous attempts do the following:

  1. Press ⊞ WINDOWS + S to open search
  2. Type in Terminal
  3. Select Run as administrator
  4. Click on Yes on the User account control (UAC) pop up
  5. Press CTRL + SHIFT + 2 to open Command prompt
  6. Type in sfc /scannow and press ENTER
  7. Wait for the scan to finish
  8. Reboot the computer

Perform a system restore

If for any reason previous solutions have not provided you with the solution we will try to fix the issue by performing system restore.

  1. Press ⊞ WINDOWS + S to open search
  2. In the text box type in Create a restore point
  3. Click on the closest match in search results, should be Create a restore point
  4. Click on System Restore or on Next if there are no points created
  5. Choose to restore a point from the list and click on next
  6. Review settings and click on Finish
  7. Wait for the process to finish and for the computer to restart

Manually install update

If for any reason Windows still cannot install the update, try installing it manually.

  1. Go to Windows 11 update history and find the Knowledge base (KB) number for the latest version
  2. Go to the official Microsoft Update Catalog
  3. Paste the KB number in the search box and press ENTER
  4. Click on DOWNLOAD
  5. Double click on the downloaded file to launch the installer
  6. Follow on-screen instructions and install the update

Perform Windows 11 reset

If nothing worked, reset your Windows 11 to its factory settings to fully repair and reset the whole operating system.

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