Hi there! I understand you're trying to disable the auto-fill feature in the pdfFiller app. That can definitely help if you want to fill forms manually without automatic suggestions popping up.

To help me guide you better, could you clarify a bit? Are you using pdfFiller through a web browser on your Windows 10 device, or do you have a specific pdfFiller desktop or mobile app installed? Also, when does the auto-fill happen—while opening certain PDFs, filling forms, or right from the start?

Meanwhile, here’s a general step-by-step approach for disabling autofill in pdfFiller accessed via browser on Windows:

1. Clear Saved AutoFill Data in pdfFiller: Sometimes saved form data triggers autofill. Look for any settings in your pdfFiller account’s profile or preferences related to AutoFill or form data and clear or disable it.

2. Browser Autofill Settings: Since you’re on a WebKit browser on Windows 10, your browser’s autofill settings might be contributing. Check your browser’s settings for Autofill or Form Fill and turn those off.

3. In-pdfFiller Form Filling:
- Open a PDF form in pdfFiller.
- Try locating a gear icon or settings related to form filling or AutoFill.
- Disable any auto-complete, auto-fill, or auto-suggest features available.

4. Refresh and Retry: After changing settings, reload pdfFiller and try filling the form again to see if auto-fill is disabled.

If these don’t resolve the issue, I can help you dive deeper into pdfFiller’s app settings, or if you prefer, we can look at browser-level or OS-level form autofill settings. Let me know what you’ve tried so far or if you want me to walk you through any of these steps!

Are you satisfied with these first steps, or do you want me to provide more detailed instructions based on your environment?