amsi.dll - 分析和如何纠正错误

★★★★☆ 已验证的文件 (27.08.2026)

️ ️ ️ ️ ️ ️ ️ Important Notice: 增强应用程序安全措施的AMSINTOOLS库组件. 手动更换系统库可能会阻碍未来的Windows更新或导致关键系统故障.

建筑:	其他	️没有检测到
防病毒扫描	✅ 清洁	没有检测到病毒.
数字签名	没有签名	没有签名,文件可能被修改了.
哈希完整性	️未经验证	文件哈希保护缺失.
文件大小	它们的数量为16.3KB.	16677 bytes.

哈希号:

MD5: 247cd35421b6f380e09732211fffd495
SHA-1: 7710e6541a90bf93329b174a5d8f59f129f5b0f8
SHA-256: 9077a0e7f4bbdd665c316ca833e65df89aae6ac2168679e3eef4adb6de8fb549
SHA-512: 194b1e29e02d15625f3b925037d6af867ab332029375c999aa9fbc3be251dbab3f0c47cc259fcfeca5d0f26d939484c67a3d64e3188222a0b735d355308fd6a0

What is amsi.dll?

Amsi.dll is the core component of the Antimalware Scan Interface (AMSI), a critical Windows security feature introduced by Microsoft. It acts as an interface that allows applications (like PowerShell, Command Prompt, or third-party apps) to send script content and code to the installed antivirus program for scanning before execution.

标准文件位置

The legitimate amsi.dll file is a system file and is located in the following standard directories:

64-bit systems (64-bit version): C:\Windows\System32\amsi.dll
64-bit systems (32-bit compatibility version): C:\Windows\SysWOW64\amsi.dll

If you find this file inside a user folder, desktop, or temporary directory, it might be malware masking itself as a system file.

How to Fix amsi.dll Errors Without Downloading Anything

相关的错误 amsi.dll usually mean the file is corrupted, missing, or blocked by a conflicting program. Do not download dll files from third-party websites, as they often contain malware.

Here are the safest ways to fix the error using built-in Windows tools:

方法1:运行系统文件检查器 (SFC) 和DISM

Windows has built-in repair tools that can automatically replace corrupted system files like amsi.dll using safe, internal backups.

按下 Windows Key, 类型 cmd,右键按下 Command Prompt,并选择 Run as administrator.
Type the following command to check and repair system files, then press Enter:
```
sfc /scannify
```
After the scan finishes, type this command to repair the Windows system image, then press Enter:
```
DISM /Online /Cleanup-Image /RestoreHealth
```
Restart 你的电脑.

Method 2: Re-register the DLL File

If the file exists but Windows is having trouble recognizing it, you can manually re-register it.

打开 Command Prompt 作为一个管理员.
输入下面的命令并按下 Enter:
```
regsvr32 amsi.dll
```
If you get a success message, click OK and restart your app.

Method 3: Check for Windows Updates

微软经常更新系统文件,如 amsi.dll to fix bugs and vulnerabilities.

按下 Windows Key + I 为了打开. Settings.
让我们去 Update & Security (或是 Windows Update 在Windows 11上).
点击 Check for updates 并安装任何可用的更新.
Restart 你的电脑.

Method 4: Update or Disable Third-Party Antivirus

Sometimes, third-party antivirus software conflicts with the Windows AMSI module, leading to crashes or errors.

只是暂时的. disable your third-party antivirus (e.g., Avast, Kaspersky, McAfee).
Check if the error persists.
If the error goes away, update your antivirus to the latest version, or uninstall it and rely on the built-in Windows Defender.

If you'd like, let me know:

这是什么? exact error message you see on your screen?
When does the error happen ? (e.g., when launching a specific app, opening PowerShell, or booting up Windows?)
哪些 version of Windows are you currently using?

I can help you narrow down the exact cause and fix it.

诊断工具:验证您的 `amsi.dll` 文件

您担心您的PC上的文件被恶意软件修改了吗? 放入下面的表格. 我们的脚本将验证其文件大小,加密哈希 (MD5/SHA-1),并检查有效的微软数字签名.

其他版本:
️ amsi.dll 10.0.19041.4355 32-bit (x86) | ️ amsi.dll 10.0.19041.4355 64-bit (x64)
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️rtstreamsink.ax | ️amsiproxy.dll