Stopping a VBA script that has entered an infinite loop can be challenging, especially if the loop prevents user interaction with the Excel application interface. However, there are a few methods you can use to interrupt the script execution and regain control:

Press Esc (Escape) Key : If you're able to access the Excel application window, pressing the Esc key may interrupt the script execution and halt the infinite loop. This method relies on the ability to interact with the application interface.

Press Ctrl + Break (Ctrl + Pause) : In some cases, pressing Ctrl + Break (or Ctrl + Pause) on your keyboard can also halt the execution of a VBA script. This method interrupts the script execution and may allow you to regain control.

Use Task Manager : If other methods fail, you can use the Task Manager (Ctrl + Shift + Esc) to force close the Excel application. This action will terminate the script execution along with the entire Excel process. However, be cautious as this method will result in the loss of any unsaved data in your Excel workbook.
Debugging Tools : If you have access to the VBA editor while the script is running, you can try pausing the execution manually by clicking the "Pause" button in the toolbar or pressing Ctrl + Break. Once paused, you can review the code and make necessary adjustments to correct the infinite loop.

Timeout Mechanism : Implement a timeout mechanism within your VBA script to limit the duration of loops or repetitive processes. For example, you can use a timer variable to track the elapsed time and exit the loop if it exceeds a certain threshold.

It's important to design your VBA scripts with error handling and loop control mechanisms to prevent infinite loops and handle unexpected scenarios gracefully. Additionally, testing your code thoroughly before deployment can help identify and address potential issues, including infinite loops.