PDFs Not Previewing After Windows Update - Easy Fix!

Having trouble seeing your PDF or document preview in Windows File Explorer? You’re not alone — after the October 2025 Windows security update, Microsoft automatically disabled the preview feature for any file downloaded from the internet. In this quick tutorial, I’ll show you exactly how to fix it step by step: Why the preview stopped working How to Unblock your PDF or document How to Restart File Explorer if it’s still not showing Works for Windows 11 and Windows 10 Follow these simple steps to get your PDF, Word, Excel, and image previews back in seconds! Steps Mentioned in This Video: 1. Right-click the file → Properties 2. Tick "Unblock", then click Apply → OK 3. If still not showing → Right-click Start → Task Manager → File Explorer → Restart Done! Your PDF preview will appear instantly. Timestamps: 00:00 – Intro 00:15 – Why previews stopped working 00:35 – Fix #1 – Unblock the file 00:55 – Fix #2 – Restart File Explorer 01:10 – Final check Hashtags: #Windows11 #FileExplorer #PDFFix #WindowsUpdate #TechTips #Tutorial #PDFPreview #WindowsFix #FileExplorerPreview