A Basic Application Could Not Be Started Wincc 75 _best_ -

Troubleshooting Guide: Fixing "A Basic Application Could Not Be Started" in WinCC 7.5

Introduction

If you are a Siemens WinCC user (specifically version 7.5 or similar), few errors are as frustrating as the ominous message:

Here are the primary troubleshooting steps to resolve this issue:  1. Check Software Compatibility 

Step 3: Disable UAC via Registry (Most Effective Fix)

For many Siemens automation environments, disabling User Account Control (UAC) entirely is the standard solution.

Solution: