0x8004210A is a typical POP3 email error message. This error may sometimes occur when you try to check your Post Office Protocol 3 (POP3) email account. 0x8004210A error code hampers your ability to both send and receive e-mails on your Outlook account.
Error 0x8004210A is displayed in any one of the following formats on your PC:
The operation timed out waiting for a response from the receiving (POP) server 0x8004210a
Task 'SMTP server name - Sending and Receiving reported error' (0x8004210A): 'The operation timed out waiting for a response from the receiving (POP) server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'
Error 0x8004210A occurs due to several reasons. However, some of the most common reasons include:
No matter what the cause of this error is, to resume email communication via Outlook and to ensure your work productivity is not affected, it is recommended that you resolve this 0x8004210A error code on your PC immediately.
To fix error 0x8004210A, here are some of the most efficient and easy manual methods that you can try:
If the cause of the error is related to the internet connection then here’s what you need to do. Try freeing up your internet connection by closing any other online activities in progress or downloads being carried on your system.
Try to increase your server time-out periods. To do this, go to the Outlook File menu and choose account settings. Now double click on your email account and more settings. Now click advanced and increase your server timeout period to resolve.
If you are trying to send or receive large and heavy emails on your Outlook account, the error 0x8004210A may pop up.
This happens because when transferring heavy files the email account automatically locks until the task is complete, however, if it takes more time the next Send and Receive job starts while the first one is still not complete.
In such an event, the email server then times out and shows you the error. Therefore to resolve, you will have to show patience. Simply wait for the large email to be sent or received before you start sending another email.
If the antivirus installed on your system is the reason for the error pop up, then disable it for a while until the operation is complete. Then enable it once the task is performed successfully.
Similarly, if the Firewall installed on your system is preventing Outlook from reaching your mail server, then simply disable the Firewall to resolve.

Error code 0xc000021a occurs when the system is unable to start or there’s a failure in critical system processes. Normally, it would take about several seconds for the system to boot and while on the startup process, error code 0xc000021a may take place to block the system to boot up. Users will get a blue screen of death (BOSD) when this error occurs. When upgrading to Windows 10, be careful; you might encounter other error messages such as error code 8007002c.
Error CausesThere are several reasons why error code 0xc000021a occurs. It is important to have a full understanding of what caused the blue screen of death before attempting to fix the error by yourself. See below for a few common causes:
• Computer malware has infiltrated your device.
• Important files such as Winlogon.exe and Csrss.exe are damaged. Winlogon.exe file is responsible for handling the login and logout processes while Csrss.exe is a vital part of Microsoft Client or Server ‘Runtime Server Subsystem’. Once one of these files is damaged or deleted, a stop error will occur.
• When there are mismatched system files installed or system upgrading process failed or still incomplete.
• Premature unloading of Wbemprox.dll
• Newly installed third-party software is not compatible with the operating system.
• There are corrupted, outdated, or incorrectly configured device drivers.
• There’s insufficient space in the system partition. Once the system partition is full, certain errors such as error code 0xc000021a will manifest.
• Windows registry is corrupted or damaged due to a software or system change. This means there are registry entries that are not cleared after uninstalling an application.
In fixing error code 0xc000021a, you might want to try and manually do so. Manual repair methods can give users effective and efficient solutions, addressing the root problems in relation to Windows error codes. Once the manual repair method is correctly implemented, users will be able to resolve issues immediately. However, there might be instances when a Windows professional is needed. In such cases, seek help from a certified Windows expert or you might want to consider using an automated tool whenever necessary.
Email Access Online is a browser extension published by Polarity Technologies Ltd. That offers users quick and easy access to emails and weather reports. While this might sound interesting and useful, there is nothing this extension offers that cannot be solved with a few simple bookmarks.
While installed Email Access Online monitors the user's browser activity and records visited websites, clicked links, and bought products, this data is later used to serve partner ads if the user looks for the covered categories, additionally, it will hijack your new tab page, changing your search engine to Yahoo to allow easier ad placement.
Browsing the internet with this extension enabled will result in additional ad placement, pop-up ads, and sponsored links throughout your browsing sessions.
Upon further investigation, it was discovered that this extension is a repack of MyEmailXP, which was a repack of Fast Email Checker. Due to its suspicious delivery methods and information gathering, several anti-virus scanners have marked this extension as a browser hijacker and it is recommended to remove it from your computer.
Once it opens, click on Device Manager to open it,
If you have a driver device error inside Windows, you should see it immediately when entering the Device Manager, it will have a yellow exclamation mark beside it. Right-click on it and choose update driver.RegClean Pro is a program developed by Systweak Inc. RegClean Pro cleans such invalid registry errors using its advanced scan engine. It not only fixes invalid registry entries, it also defragments the registry, keeping it streamlined for smoother system performance.
RegClean Pro defines auto-start registry entities that allow the program to run each time the system is restarted, it also adds various Scheduled tasks in Windows Task Manager in order to launch the application at various times. This application has been found bundled up with various other potentially unwanted applications, also several anti-virus programs have detected this application for optional removal.
FullTab is a Browser Extension for Google Chrome, Firefox, and Internet Explorer. When installed this extension hijacks your home page, and changes your default search engine to http://search.fulltabsearch.com. This extension usually comes bundled with other freeware software, and while installed it monitors your internet browsing activity, visited links, clicked pages, and other private information that it later uses to distribute targeted unwanted ads in your search results.
While this extension is installed, you will see modified search results, injected ads, sponsored links, web page redirects, and sometimes even pop-up ads. Several anti-virus scanners have detected this extension as a Browser Hijacker, and due to the information it is gathering from your computer it is not recommended to keep.
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