Some of you cannot open JPEG files in Windows 10/11 after an upgrade. The situation can be different for everyone. But what happens when suddenly one day, you’re Unable to Open JPEG files? You may have thousands of JPEG or JPG photos stored on a computer, hard drive, memory cards, etc. Method 8: Use sfc/scannow in Command Prompt.Method 7: Perform Clean Boot in your PC.Method 6: Open JPG files in Image Editors.Method 3: Go back to Photo Viewer of an older version.Method 1: Update to the latest Windows Photo Viewer or Photos App.Best Methods to fix error ‘Unable to open JPEG file’.