permission-denied.md

Permission Denied When Installing

Problem

Installation fails with permission errors when trying to install a new PHP version.

Cause

Installing PHP versions requires write access to the XAMPP directory (C:\xampp), which typically requires administrator privileges.

Solution

Run PowerShell as Administrator before installing PHP versions.

How to Run PowerShell as Administrator

Method 1: Start Menu

1. Press the Windows key
2. Type "PowerShell"
3. Right-click on "Windows PowerShell"
4. Select "Run as Administrator"

Method 2: Win + X Menu

1. Press Win + X
2. Select "Windows PowerShell (Admin)" or "Terminal (Admin)"

Method 3: From File Explorer

1. Open File Explorer
2. Navigate to any folder
3. Click "File" → "Open Windows PowerShell" → "Open Windows PowerShell as administrator"

After Opening as Administrator

Once you have an administrator PowerShell window, run your install command:

pxp install 8.2.27

Verifying Administrator Access

To check if you're running as administrator, look for "Administrator" in the PowerShell window title:

Administrator: Windows PowerShell

Or run this command:

([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)

This should return True if you have administrator privileges.

Alternative: Run Specific Command as Admin

If you don't want to open a new admin window, you can run a specific command with admin rights:

1. Right-click on PowerShell/Terminal icon
2. Select "Run as Administrator"
3. In the admin prompt, run: pxp install [version]

Common Permission Error Messages

You might see errors like:

• "Access to the path is denied"
• "UnauthorizedAccessException"
• "Administrator rights required"

All of these indicate you need to run PowerShell as Administrator.

Related Resources

• Windows User Account Control
• Back to Troubleshooting Index