当您尝试更新病毒定义并且尝试了所有方法但错误仍然存在时，您是否看到“病毒定义失败”错误？^{(virus definition failed)}在此博客中，我们为病毒定义失败错误提供了简单的修复，这里是Avast Antivirus 中“病毒定义失败”^{(fix for ‘Virus Definition Failed’ in Avast Antivirus)}的修复。

对于初学者，Avast Antivirus是由Avast为Microsoft Windows、macOS、Android和 iOS 创建的互联网安全软件。Avast Antivirus提供免费和高级版本，包括计算机安全、浏览器安全、防病毒软件和反垃圾邮件保护。

为什么 Avast 中会出现 Virus Definition Failed 错误？^{(Why does the Virus Definition Failed error occur in Avast?)}

在大多数情况下，此问题是由Avast公司之前在 6.16 版中修复的更新或修复缺陷引起的。因此，为了快速轻松地解决问题，请将您的 Avast Antivirus 升级^{(upgrade your Avast Antivirus)}到可用的最新版本。

如果程序没有更新，很可能是因为某些文件已损坏。在这种情况下，您可以使用Avast内置故障排除程序来使应用程序能够自行修复。

修复 Avast Antivirus 中的病毒定义失败

修复^{(Fix Virus Definition)}Avast Antivirus中的病毒定义失败

现在我们知道了发生此错误的可能原因，让我们讨论有关如何修复 Avast Antivirus 中的病毒定义失败错误的解决方案。^{( how to fix the Virus Definition Failed error in Avast Antivirus.)}

方法 1：更新Avast 防病毒^{(Avast Antivirus)}软件

大多数用户声称他们遇到了这个问题，即使他们已将Avast更新到 6.16 版。经过详细检查，我们发现该问题是由于更新涉及的错误日期引起的。尽管更新已正确安装并且病毒防护签名是最新的，但错误的日期导致病毒签名更新机制^{(Virus Signature Update Mechanism)}显示错误。

请按照以下步骤使用正确的日期更新Avast ：

单击 Avast Antivirus 应用程序中的菜单^(Menu)图标。
选择设置^{( Settings)}菜单。
从“设置”^(Settings)面板上显示的主要选项卡列表中选择“常规”选项卡。^{(General )}
最后，单击检查更新^{(Check for updates)}并检查是否在更新^(Update)子选项卡中设置了正确的日期。^{(check if the correct date is set)}现在，等待该过程完成。
重新启动您的 PC 并验证病毒定义失败错误是否已修复。

方法 2：修复 Avast Antivirus

“病毒定义更新失败”错误也可能是由部分损坏的Avast程序引起的。在某些情况下，错误消息显示为Downloading of VPS failed。大多数情况下，出现问题的原因可能是计算机意外关闭，或者是因为安全扫描程序在更新过程中不断损坏特定对象。

如果这种情况适用于您，您可以通过使用Avast故障排除选项自行修复来解决病毒定义失败问题。

以下是通过内置故障排除程序修复Avast应用程序的简单步骤：^(Avast)

打开Avast并导航到位于右上角的操作菜单。^{(Action menu)}
选择设置^(Settings) > General tab.
从子菜单中，选择故障排除。^{(Troubleshooting. )}
向下滚动到故障排除选项卡的^{(Troubleshooting)}仍然存在问题^{(Still having problems)}部分，现在选择修复应用程序^{(Repair app)}。
出现确认消息时，选择Yes。然后，等待扫描完成。
扫描完成后，选择全部解决^{(Resolve all)}以解决扫描期间发现的所有问题。

这应该可以解决Avast中的所有问题，并且您应该能够享受计算机的无病毒和无错误功能。

另请阅读：^{(Also Read:)} 如何从 Windows 10 中删除 Avast^{(How to Remove Avast from Windows 10)}

方法 3：重新安装 Avast^{(Method 3: Reinstall Avast)}

如果一切都失败了，重新安装Avast应用程序肯定会消除所有小故障、错误以及病毒定义失败错误。以下是有关如何执行此操作的步骤：

1. 同时按Windows + R键打开运行框。^{( Run)}

2. 要启动卸载或更改程序^{(Uninstall or change a program)}，请在运行^(Run)框中键入“ appwiz.cpl” ，然后单击^{(appwiz.cpl”)}确定。^(OK.)

在运行框中键入 appwiz.cpl，然后单击确定 | 已修复：Avast Antivirus 中的“病毒定义失败”

3. 右键单击 Avast 文件夹^{(Avast folder)}并选择卸载^(Uninstall)。

选择 Avast Free Antivirus，然后选择卸载。

4. 删除Avast后，前往官网^{(official website)}下载^(download)最新的软件版本。

重新安装Avast并不是最好的方法，但如果内置修复机制不起作用，您可能还是不得不这样做。

注意：^(Note:)在某些情况下，您可能需要安装旧版本的程序，直到最新版本中的缺陷得到解决。

受到推崇的：^{(Recommended:)}

修复 Windows 找不到 Steam.exe 错误^{(Fix Windows Cannot Find Steam.exe error)}
如何修复 Google Drive Access Denied 错误^{(How To Fix Google Drive Access Denied Error)}
如何在 Windows 上键入带重音符号的字符^{(How to Type Characters with Accents on Windows)}
在 Windows 10 中完全卸载 Avast Antivirus 的 5 种方法^{(5 Ways to Completely Uninstall Avast Antivirus in Windows 10)}

我们希望本指南对您有所帮助，并且您能够修复^(fix) Avast 中的病毒定义失败错误。^{(virus definition failed error in Avast.)} 如果您对本文有任何疑问/评论，请随时将它们放在评论部分。

Fix Virus Definition Failed in Avast Antivirus

Do you see the ‘virus definition failed’ error when you try to update virus definitions and you tried everything but, the error persists? In this blog, we have provided easy fixes for virus definition failed errors, and here is a fix for ‘Virus Definition Failed’ in Avast Antivirus.

For beginners, Avast Antivirus is an internet security software created by Avast for Microsoft Windows, macOS, Android, and iOS. Avast Antivirus offers free and premium versions that include computer security, browser security, antivirus software, and anti-spam protection.

Why does the Virus Definition Failed error occur in Avast?

In most situations, this problem is caused by an update or repair defect that Avast company had previously fixed with version 6.16. So, for a quick and hassle-free resolution, upgrade your Avast Antivirus to the most recent version available.

If the program is not getting updated, it’s most likely because some files have gotten corrupted. In this instance, you can use the Avast built-in troubleshooter to enable the application to repair itself.

Fix Virus Definition Failed in Avast Antivirus

Now that we know of the possible reasons for this error to occur, let us discuss the solutions on how to fix the Virus Definition Failed error in Avast Antivirus.

Method 1: Update Avast Antivirus software

Most users claimed that they experienced this problem, even though they had updated Avast to version 6.16. After a detailed examination, we found that the issue arose due to a faulty date involved in the update. Although the update was installed properly and the virus protection signature was up-to-date, the faulty date caused the Virus Signature Update Mechanism to display an error.

Follow these steps to update Avast with the correct date:

Click on the Menu icon in the Avast Antivirus app.
Select the Settings menu.
Select the General tab from the list of primary tabs displayed on the Settings panel.
Finally, click the Check for updates and check if the correct date is set in the Update sub-tab. Now, wait for the process to finish.
Restart your PC and verify if the virus definition failed error is fixed.

Method 2: Repair Avast Antivirus

The ‘Virus definitions update failed’ error might also be caused by a partially damaged Avast program. In some cases, the error message reads, Downloading of VPS failed. Mostly, the problem arose either because of an unexpected computer shutdown or because a security scanner kept corrupting particular objects during the update process.

If this situation applies to you, you can resolve the virus definition failed problem by utilizing the Avast troubleshooting options to repair itself.

Here are the simple steps to repair the Avast application via its built-in troubleshooter:

Open Avast and Navigate to the Action menu located at the top right corner.
Select Settings > General tab.
From the sub-menu, choose Troubleshooting.
Scroll down to the Still having problems section of the Troubleshooting tab, now Select Repair app.
When the confirmation message appears, choose Yes. Then, wait for the scan to finish.
Once the scan is complete, select Resolve all to resolve all the issues that were discovered during the scan.

This should fix all problems within Avast, and you should be able to enjoy the virus-free & error-free functioning of your computer.

Also Read: How to Remove Avast from Windows 10

Method 3: Reinstall Avast

If all else fails, reinstalling the Avast app should definitely get rid of all minor glitches, bugs & also, virus definition failed error. Here are the steps on how to do it:

1. Open the Run box by pressing Windows + R keys together.

2. To launch Uninstall or change a program, type “appwiz.cpl” in the Run box and click OK.

type appwiz.cpl in the Run box and click OK | Fixed: ‘Virus Definition Failed’ in Avast Antivirus

3. Right-click on the Avast folder and choose Uninstall.

Select Avast Free Antivirus and select Uninstall.

4. After you’ve deleted Avast, go to the official website and download the latest software version.

Reinstalling Avast isn’t the best approach, but if the built-in repair mechanism doesn’t work, you’ll probably have to do it anyway.

Note: In some cases, you may want to install an older version of the program until the flaws in the newest version have been resolved.

Recommended:

We hope that this guide was helpful and you were able to fix virus definition failed error in Avast. If you have any queries/comments regarding this article, then feel free to drop them in the comments section.

鑫赵

About the author

我是一名软件工程师，拥有 Xbox Explorer、Microsoft Excel 和 Windows 8.1 Explorer 方面的经验。业余时间，我喜欢玩电子游戏和看电视。我拥有犹他大学的学位，目前在一家国际公司担任软件工程师。

修复 Avast Antivirus 中的病毒定义失败

修复^{(Fix Virus Definition)}Avast Antivirus中的病毒定义失败

方法 1：更新Avast 防病毒^{(Avast Antivirus)}软件

方法 2：修复 Avast Antivirus

方法 3：重新安装 Avast^{(Method 3: Reinstall Avast)}

Fix Virus Definition Failed in Avast Antivirus