当您尝试安装Microsoft Windows Installer 程序^{(Microsoft Windows Installer)}包时，您可能会收到以下错误消息： 错误 1603：安装过程中出现致命错误。如果在消息框中单击确定，安装将回滚。

错误 1603 的原因：安装过程中发生致命错误

如果以下任一条件为真，您可能会收到此错误消息：

1. 您尝试安装Windows Installer 程序^{(Windows Installer)}包的文件夹已加密。

2. 包含您尝试安装Windows Installer 程序^{(Windows Installer)}包的文件夹的驱动器作为替代驱动器访问。

3. SYSTEM帐户对您尝试安装Windows Installer软件包的文件夹也没有完全控制权限。^{(Full Control)}您注意到错误消息是因为Windows Installer服务使用SYSTEM帐户安装软件。在此处阅读如何在没有管理员权限的情况下安装软件。^{(How to Install Software Without Admin Rights here.)}. 在此处阅读如何在没有管理员权限的情况下安装软件。^{(How to Install Software Without Admin Rights here.)}.

修复错误 1603^{(Fix Error 1603)}：安装过程中发生致命错误

要自动修复此问题，请使用Microsoft 的修复工具^{(fix it tool by Microsoft’s)}。

现在，如果上述方法不适合您，请遵循本指南：

1）双击桌面上的“这台电脑^{(This PC)}”。

2)右键单击^{(Right-click)}​​要安装程序的驱动器，然后选择“^{(Choose “)}属性”。^{(Properties.)}“

3)单击“安全^(Security)”选项卡，然后单击“编辑^(Edit)”按钮。

4)在用户名“ SYSTEM ”内的“^(SYSTEM)权限^{(Permissions)}”子标题下，勾选“完全控制^{(Full Control)}”旁边的“允许^(Allow)” ，然后单击“应用^(Apply)”，然后单击“确定”。

5）如果在此处找不到“SYSTEM”，则单击“添加^(Add)”，在对象名称下写“ SYSTEM ”单击“确定”并重复步骤4。

6) 现在返回安全^(Security)选项卡并单击“高级”。^(Advanced.)“

7)选中“将所有子对象上的权限条目替换为此处显示的适用于子对象的条目。^{(Replace permission entries on all child objects with entries shown here that apply to child objects.)}” 点击“确定”。如果您使用其他版本的Windows ，请选中“重置所有子对象的权限并启用可继承权限的传播^{(Reset permissions on all child objects and enable propagation of inheritable permissions)}” 。点击“确定”。

8)出现提示时单击“是”。^(Yes)

9）双击^{(Double-click)}安装程序包，您将不再有任何问题。

方法 2：安装所有权注册表黑客^{(Ownership Registry Hack)}

1.下载^(Download)并解压文件。

2.双击InstallTakeOwnership.reg文件。

3.右键单击出现错误 1603 的文件并选择 take Ownership^{(Error 1603 and select take Ownership)}。

4.再次尝试安装安装包，问题成功解决。

5.如果由于某种原因您想删除安装所有权^{(Install Ownership)}快捷方式，只需双击RemoveTakeOwnership.reg文件。

方法 3：重新启动Windows 安装程序服务^{(Windows Installer Service)}

1.按 Windows 键 + R 然后键入services.msc并按 Enter。

2.找到Windows Installer 服务^{(Windows Installer service)}，然后右键单击它并选择属性。^{(Properties.)}

3.如果服务尚未运行，请单击开始。^(Start)

4.如果服务已经在运行，则右键单击并选择重新启动。^(Restart.)

5.再次尝试安装出现拒绝访问错误的程序。

方法 4： 重新注册 Windows Installer^{(Re-register Windows Installer)}

1.按Windows Key + X然后选择命令提示符（管理员）。^{(Command Prompt (Admin).)}

2.在cmd中输入^(Enter)以下命令并在每个命令后按Enter：

%windir%\system32\msiexec.exe /unregister
%windir%\system32\msiexec.exe /regserver
%windir%\syswow64\msiexec.exe /unregister
%windir%\syswow64\msiexec.exe /regserver

3.重新启动您的 PC 以保存更改。

4.如果问题未解决，请按Windows键 + R，然后键入以下内容并按 Enter：

%windir%\system32

5.找到Msiexec.exe文件，然后记下文件的确切地址，如下所示：

C:\WINDOWS\system32\Msiexec.exe

6.按 Windows 键 + R 然后键入regedit并按Enter打开注册表编辑器^{(Registry Editor)}。

7.导航到以下注册表项：

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSIServer

8.选择MSIServer，然后在右侧窗格中双击ImagePath。

9.现在在值数据字段中键入您上面提到的Msiexec.exe 文件^{( Msiexec.exe file)}的位置，后跟“/V”，整个事情看起来像：

C:\WINDOWS\system32\Msiexec.exe /V

10. 使用此处列出的任何方法将您的 PC 引导至安全模式。^{(methods listed here.)}

11.按Windows Key + X，然后选择命令提示符（管理员）。^{(Command Prompt (Admin).)}

12.键入以下命令并按Enter：

msiexec /regserver

%windir%\Syswow64\Msiexec /regserver

13.关闭一切并正常启动您的PC。

为你推荐：^{(Recommended for you:)}

• 如何修复 BOOTMGR 缺少 Windows 10^{(How to fix BOOTMGR is missing Windows 10)}
• 修复驱动程序电源状态故障 Windows 10^{(Fix Driver Power State Failure Windows 10)}
• 修复我们无法完成更新，撤消更改^{(Fix We couldn’t complete the updates, Undoing changes)}
• 如何修复自动修复无法修复您的电脑^{(How to fix Automatic Repair couldn’t repair your PC)}

就是这样，您已成功修复错误 1603：安装过程中发生致命错误，^{(Error 1603: A fatal error occurred during installation)}但如果您仍有任何问题，可以在评论部分提出。

Fix Error 1603: A fatal error occurred during installation

When you try to install a Microsoft Windоws Installer packagе, you may receive the following error message: Error 1603: A fatal error oсcurred during installаtion. If you click OK in the message box, the installation rоlls back.

Cause for Error 1603: A fatal error occurred during installation

You may receive this error message if any one of the following conditions is true:

1. The folder that you are trying to install the Windows Installer package is encrypted.

2. The drive that contains the folder that you are trying to install the Windows Installer package is accessed as a substitute drive.

3. The SYSTEM account does not have Full Control permissions on the folder that you are trying to install the Windows Installer package too. You notice the error message because the Windows Installer service uses the SYSTEM account to install the software. Read How to Install Software Without Admin Rights here.. Read How to Install Software Without Admin Rights here..

Fix Error 1603: A fatal error occurred during installation

For automatically fixing this issue use the fix it tool by Microsoft’s.

Now if the above didn’t work out for you then follow this guide:

1)Double click “This PC” on your desktop.

2)Right-click the drive where you want to install the program and Choose “Properties.“

3)Click the “Security” tab and then click the “Edit” button.

4)Check “Allow” next to “Full Control” under the subheading “Permissions” inside the user name “SYSTEM” and click “Apply” then “OK.”

5)If you can’t find “SYSTEM” there, then click “Add” and under object name write”SYSTEM” click “OK” and repeat the step 4.

6)Now go back to the Security tab and click on “Advanced.“

7)Check “Replace permission entries on all child objects with entries shown here that apply to child objects.” Click “OK.” Check “Reset permissions on all child objects and enable propagation of inheritable permissions” if you use other versions of Windows. Click “OK.”

8)Click “Yes” when prompted.

9)Double-click the installer package and you will no longer have any issues with it.

Method 2: Install Ownership Registry Hack

1.Download and unzip the files.

2.Double-click the InstallTakeOwnership.reg file.

3.Right-click the on the file which is giving the Error 1603 and select take Ownership.

4.Again try to install the installer package and the issue is successfully fixed.

5.If for some reason you want to delete the Install Ownership shortcut, just double click RemoveTakeOwnership.reg file.

Method 3: Restart the Windows Installer Service

1.Press Windows Key + R then type services.msc and hit Enter.

2.Find Windows Installer service then right-click on it and select Properties.

3.Click on Start if the service is not already running.

4.If the service is already running then right-click and select Restart.

5.Again try to install the program which was giving access denied error.

Method 4: Re-register Windows Installer

1.Press Windows Key + X then select Command Prompt (Admin).

2.Type the following command into cmd and hit Enter after each one:

%windir%\system32\msiexec.exe /unregister
%windir%\system32\msiexec.exe /regserver
%windir%\syswow64\msiexec.exe /unregister
%windir%\syswow64\msiexec.exe /regserver

3.Reboot your PC to save changes.

4.If the issue is not resolved then press Windows key + R then type the following and hit Enter:

%windir%\system32

5.Locate the Msiexec.exe file then note down the exact address of the file which would be something like this:

C:\WINDOWS\system32\Msiexec.exe

6.Press Windows Key + R then type regedit and hit Enter to open Registry Editor.

7.Navigate to the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSIServer

8.Select MSIServer then in the right window pane double-click on ImagePath.

9.Now type the location of the Msiexec.exe file which you noted above in the value data field followed by “/V” and the whole thing would look like:

C:\WINDOWS\system32\Msiexec.exe /V

10.Boot your PC into safe mode using any of the methods listed here.

11.Press Windows Key + X then select Command Prompt (Admin).

12.Type the following command and hit Enter:

msiexec /regserver

%windir%\Syswow64\Msiexec /regserver

13.Close everything and boot your PC normally.

Recommended for you:

• How to fix BOOTMGR is missing Windows 10
• Fix Driver Power State Failure Windows 10
• Fix We couldn’t complete the updates, Undoing changes
• How to fix Automatic Repair couldn’t repair your PC

That’s it you have successfully fix Error 1603: A fatal error occurred during installation but if you still have any questions you can ask them in the comments section.

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