在Windows中，您可能经常会遇到从未听说过的文件名，因此会发现它们很可疑。但是，并非所有这些都应该被视为病毒或恶意软件。其中大多数是某些进程所需的合法文件。一个这样的实例是MPSigStub.exe文件。有时，已知此文件会导致CPU 使用率过高^{(high CPU usage)}。

^(MPSigStub)Windows 11/10MPSigStub高CPU使用率

MPSigStub.exe是一个帮助安装Windows 更新^(Updates)的文件。它更广为人知的是Microsoft 保护签名存根^{(Microsoft Protection Signature Stub)}。该文件的功能主要是在您的PC上提取下载的Windows Update 。此活动可能会导致CPU使用率过高，但问题只会持续几分钟。如果您经常遇到此问题，可以尝试以下方法：

1. 检查Windows 更新^{(Windows Update)}是否正在进行中
2. 检查文件位置
3. 强制删除恶意软件文件
4. 替换合法文件。

MPSigStub可以在 C:Program Files 下找到。^(MPSigStub)有时，它的标题可能会出现由一堆随机字母和数字或类似大小的数字和字母字符串扩展。没有什么可担心的，因为这些都是由Windows 更新^{(Windows Update)}创建的临时文件，作为更新过程的一部分。

1]检查^(Check)Windows更新^{(Windows Update)}是否正在进行中

由于该文件与Windows Update相关联，因此您可以在更新过程运行时看到CPU使用率激增。

给它一些时间——它会安定下来。

如果它在很长一段时间内继续显示峰值，请尝试通过Microsoft 更新目录网站^{(Microsoft Update Catalog website)}手动安装更新。

2]检查文件位置

合法的MPSigStub.exe 操作系统^{(MPSigStub.exe OS)}文件位于以下位置”

C:WindowsSystem32

如果在其他地方发现它可能是恶意软件。

在这种情况下，您可以使用任务管理器^{(using the Task Manager)}>定位^(Locate)进程> Right-click​​它> Open文件位置，导航到该文件所在的文件夹。

在那里，您可以使用防病毒软件扫描文件。如果有疑问，您还可以使用第二意见便携式恶意软件清除工具。^{(second-opinion portable malware removal tool)}

运行完整的 PC AV 扫描应该完全删除恶意软件。

3]强制删除恶意软件文件

如果您发现该文件位于非系统文件夹中，您可以使用第三方工具强制删除此恶意软件文件^{(tool to force delete this malware file)}。

有些人报告说他们在以下隐藏位置发现了恶意软件文件：

c:8c7dc26a331d59f4b1fa75799e

你需要让 Windows 显示隐藏文件，然后如果你在这里看到它，你可以安全地删除它。

4]替换合法文件

合法的MPSigStub.exe文件也可能已损坏。在这种情况下，您可以使用运行 SFC 仅替换此可能损坏的文件。

如果这没有帮助，您将必须按照此过程 修复 Windows 中损坏的系统文件。

注意^(NOTE)：我们不建议您删除合法的MPSigStub.exe系统文件或修改其文件权限。

Hope it helps!

Fix MPSigStub high CPU usage in Windows 11/10

In Wіndows, yoυ may often come acroѕs file names you neνer heard of and so, fіnd them suspicious. However, not all of thеm should be dismissed as viruses or malware. Most of them are legitimate files necessary for some рrocesses. One ѕuch instance is of MPSigStub.exe file. At times this file is known to cause high CPU usage.

MPSigStub high CPU usage in Windows 11/10

MPSigStub.exe is a file to help install Windows Updates. It is better known as Microsoft Protection Signature Stub. The file’s function is to mainly extract the downloaded Windows Update on your PC. This activity may result in high CPU usage, but the issue lasts only for a few minutes. If you face this issue often, here are a few things you could try:

1. Check if a Windows Update is in Progress
2. Check file location
3. Force delete malware file
4. Replace the legit file.

The MPSigStub can be found under C:\Program Files. Sometimes, its title may appear extended by a bunch of random letters and numbers or similarly sized strings of numbers and letters. There’s nothing to worry about it since these are all temporary files created by Windows Update as part of the updating process.

1] Check if a Windows Update is in Progress

As the file is associated with Windows Update, you can see a spike in CPU usage when the update process is running.

Give it some time – it will settle down.

If it continues to show the spike for an extended period, try installing the update manually via the Microsoft Update Catalog website.

2]  Check file location

The legit MPSigStub.exe OS file is found in the following location”

C:\Windows\System32

If it is found elsewhere it could be malware.

In this case, you could, using the Task Manager > Locate the process > Right-click on it > Open file location, navigate to the folder where this file is located.

Once there you could scan the file with your antivirus software. You could also use a second-opinion portable malware removal tool, if in doubt.

Running a full PC AV scan should remove the malware completely.

3] Force delete malware file

If you find that the file is located in a non-system folder you could use a third-party tool to force delete this malware file.

Some folks have reported that they found the malware file in the following hidden location:

c:\8c7dc26a331d59f4b1fa75799e

You need to make Windows show hidden files and then if you see it here, you could delete this one safely.

4] Replace the legit file

It is also possible that the legit MPSigStub.exe file may have got corrupted. In this scenario, you could use run SFC to replace this potentially corrupted file only.

If this does not help, you will have to follow this procedure to fix a corrupted system file in Windows.

NOTE: We do not recommend that you delete the legit MPSigStub.exe system file or modify its file permissions.

Hope it helps!

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