Fix Internal Errors 2502/2503 in Windows 8.1

The Problem:

Node.js installation failed due to errors with codes 2502 and 2503. “The installer has encountered an unexpected error installing this package. This may indicate a problem with the package.”

The Explanation:

Some Windows Installer programs that come in .msi format are incompatible with Windows 8 and do not have the “Run as Administrator” option.

The Solution:

The installer needs to be launched with administrative permissions.

1. Open Task Manager.
2. Click on the “File” menu and “Run new task“.
3. Click “Browse” and choose the msi installer file.
4. Check “create this task with administrative privileges“.
5. Click “OK” to run.