如果您尝试在 Windows 10 PC 上安装 Microsoft Office，但Office 安装失败并显示错误(Office installation fails with error)消息Access denied to installation source，那么这篇文章旨在帮助您快速轻松地解决问题以成功解决问题。
当您遇到此问题时，您将收到以下完整错误消息；
Access denied to installation source
Sorry, we ran into a problem accessing a required file. Please check that the installation source has the correct permissions, then try again.
Error Code: 30015-4 (5)
注意(Note)：随附的错误代码可能是30015-4 (5)、0x4004f00d、30175-11等。无论如何，本文提供的解决方案都适用。
此错误的潜在罪魁祸首包括：
- 第三方防火墙干扰。
- 活动 VPN 或代理服务器。
- 损坏的 Office 安装。
拒绝访问安装源– Microsoft Office错误
如果您遇到此问题，您可以尝试以下我们推荐的解决方案（不分先后顺序），看看是否有助于解决问题。
- 运行程序安装(Program Install)和卸载疑难解答(Uninstall Troubleshooter)
- 将完全控制权分配(Assign Full Control)给Microsoft Office文件夹
- 在干净启动状态下安装 Office
- 卸载(Uninstall)以前的Office安装
- 禁用/卸载第 3 方安全软件（如果适用）
- 卸载VPN客户端或删除代理(Proxy)服务器（如果适用）
- (General)安装软件时访问(Access)被拒绝错误的(Denied)一般修复
让我们看一下关于列出的每个解决方案所涉及的过程的描述。
在尝试以下任何解决方案之前，请先重新启动 Windows 10 电脑(restart your Windows 10 PC)并重试Office安装。如果这没有帮助，您可以检查更新(check for updates)并在您的 Windows 10 设备上安装任何可用的位，并查看在您尝试安装Office时错误是否再次出现。此外，如果您在执行脱机安装时遇到此问题，请在另一台计算机上运行Office安装程序文件，并查看安装程序是否正常运行。
1]运行(Run)程序安装(Program Install)和卸载疑难解答(Uninstall Troubleshooter)
此解决方案要求您运行Microsoft的程序安装和卸载疑难解答程序，并查看“拒绝访问安装源(Access denied to installation source)”错误是否已解决。当您被阻止安装或删除程序时，程序安装(Program Install)和卸载疑难解答可帮助您自动修复问题。(Uninstall)它还修复了损坏的注册表项。
2]将完全控制权分配(Assign Full Control)给Microsoft Office文件夹
此解决方案要求您为Windows 10 设备上的Microsoft Office文件夹的所有应用(ALL APPLICATIONS PACKAGES)程序包组/用户名分配完全控制权限。(assign Full Control permissions)
3 ]在干净启动(Clean Boot)状态下安装 Office(] Install Office)
执行干净启动(Performing a Clean Boot)可以消除软件安装过程中发生的任何冲突——这意味着使用最少的驱动程序和程序启动 Windows 10 计算机。
4 ]卸载(] Uninstall)以前的Office安装
以前的Office安装可能会干扰当前的Office安装。在(Ijn)这种情况下，您可以通过使用能够删除任何残留文件的Microsoft Office 卸载工具卸载Office安装来轻松解决问题。或者， 使用第三方软件卸载程序(use a third-party software uninstaller)，因为他们会彻底从Windows 10计算机中删除软件。
5]Disable/Uninstall第3方安全软件（如果适用）
此解决方案要求您暂时禁用安装在Windows 10(Windows 10)系统上的任何第三方安全软件。这在很大程度上取决于您安装的安全软件。请参阅说明手册。
通常，要禁用您的防病毒软件，请在任务栏的通知区域或系统托盘中找到其图标（通常位于桌面的右下角）。右键单击该图标并选择禁用或退出程序的选项。
如果禁用安全软件没有帮助，您可以尝试使用专用删除工具(removal tool)从 PC 中删除第三方防病毒程序， 以删除与您的防病毒程序关联的所有文件。
6]卸载VPN(Uninstall VPN)客户端或删除代理(Proxy)服务器（如果适用）
由于 某种干扰，VPN 客户端或代理服务器可能会触发此错误。(VPN client or a Proxy server)在这种情况下，您可以尝试通过 Windows 10 中 的程序和功能小程序卸载您的 VPN 软件，或从您的计算机(uninstalling your VPN software via the Programs and Features applet)中删除任何代理服务器 ，看看是否能解决问题。
7]安装软件时访问(Access)被拒绝错误的(Denied)一般(General)修复
在这里，您可以尝试在Windows 10 PC 上安装任何软件时访问被拒绝错误的一般修复。
这些解决方案中的任何一个都应该适合您！
相关帖子(Related post)：此产品安装已损坏 – Microsoft Office 错误(This product installation has been corrupted – Microsoft Office error)
Access denied to installation source - Microsoft Office error
If when you attempt to install Microsoft Office on yoυr Windows 10 PC, but the Office installation fails with error message Access denied to installation source, then this post is intended to help you with quick and easy solutions to successfully resolve the issue.
When you encounter this issue, you’ll receive the following full error message;
Access denied to installation source
Sorry, we ran into a problem accessing a required file. Please check that the installation source has the correct permissions, then try again.
Error Code: 30015-4 (5)
Note: The accompanying error codes could be 30015-4 (5), 0x4004f00d, 30175-11, etc. In any case, the solutions offered in this post applies.
The potential culprits to this error include:
- 3rd party Firewall interference.
- Active VPN or Proxy Server.
- Corrupted Office installation.
Access denied to installation source – Microsoft Office error
If you’re faced with this issue, you can try our recommended solutions below in no particular order and see if that helps to resolve the issue.
- Run the Program Install and Uninstall Troubleshooter
- Assign Full Control to Microsoft Office folder
- Install Office in Clean Boot state
- Uninstall previous Office installations
- Disable/Uninstall 3rd-party security software (if applicable)
- Uninstall VPN client or remove Proxy server (if applicable)
- General fix for Access is Denied error when installing software
Let’s take a look at the description of the process involved concerning each of the listed solutions.
Before you try any of the solutions below, first restart your Windows 10 PC and retry the Office installation. If that doesn’t help, you can check for updates and install any available bits on your Windows 10 device and see if the error reappears when you try installing Office. Also, if you’re having this issue while performing an offline installation, run the Office setup file on another computer and see if the setup runs without issues.
1] Run the Program Install and Uninstall Troubleshooter
This solution requires you to run the Program Install and Uninstall Troubleshooter from Microsoft and see if the Access denied to installation source error is resolved. The Program Install and Uninstall troubleshooter helps you automatically repair issues when you’re blocked from installing or removing programs. It also fixes corrupted registry keys.
2] Assign Full Control to Microsoft Office folder
This solution requires you to assign Full Control permissions to the ALL APPLICATIONS PACKAGES group/username for Microsoft Office folder on your Windows 10 device.
3] Install Office in Clean Boot state
Performing a Clean Boot can remove any conflicts that occur during your software installation – this means starting your Windows 10 computer with minimum required drivers and programs.
4] Uninstall previous Office installations
Previous Office installation could be interfering with the current Office installation. Ijn this case, you can resolve the issue by easily by uninstalling the Office installation using the Microsoft Office Uninstaller Tool capable of removing any remnant file. Or, use a third-party software uninstaller as they do a thorough job of removing software from a Windows 10 computer.
5] Disable/Uninstall 3rd-party security software (if applicable)
This solution requires you to temporarily disable any third-party security software installed on your Windows 10 system. This largely depends on the security software you have installed. Refer to the instruction manual.
Generally, to disable your antivirus software, locate its icon in the notification area or system tray on the taskbar (usually in the lower right corner of the desktop). Right-click the icon and choose the option to disable or exit the program.
If disabling the security software doesn’t help, you can try removing the third-party antivirus programs from your PC using the dedicated removal tool to remove all files associated with your antivirus program.
6] Uninstall VPN client or remove Proxy server (if applicable)
A VPN client or a Proxy server could trigger this error due to some kind of interference. In this case, you can try uninstalling your VPN software via the Programs and Features applet in Windows 10 or remove any proxy server from your computer and see if that resolves the issue.
7] General fix for Access is Denied error when installing software
Here you can try the general fix for access is denied error when installing any software on your Windows 10 PC.
Any of these solutions should work for you!
Related post: This product installation has been corrupted – Microsoft Office error
