You copied photos off an iPhone, the transfer worked, and Windows will not show you one of them. Nothing failed. The files are HEIC, and Windows often has no codec for them. Five fixes follow, and one stops the problem coming back.

The quick answer: double-click a HEIC photo first, because many Windows 11 PCs already open one. If not, install the free HEIF Image Extensions from the Microsoft Store. To stop new HEIC files arriving, set Settings > Camera > Formats to Most Compatible on the iPhone. Sending photos wirelessly as JPEG avoids the format entirely. Free for iPhone Free for Mac Free for Android Free for Windows

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HEIC stores an iPhone photo in half the space a JPEG needs

HEIC is a deliberate trade Apple made, not a bug in your transfer.

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Windows often has no HEVC codec, so a HEIC photo will not open

The reason Windows struggles is buried inside the file itself.

The Camera to Clipboard app showing the photo library grid on an iPhone The Camera to Clipboard app previewing a photo before sending it to the computer

Camera to Clipboard hands Windows a JPEG instead of a HEIC file

Every other fix here deals with a HEIC file that already reached your PC.

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Paste one iPhone photo with Ctrl + V or send a batch as JPEG files

What arrives on the PC depends on whether you send one photo or several.

Windows File Explorer showing iPhone photos with the HEIC file extension and MOV videos

Double-click a HEIC photo before you install anything on Windows

The cheapest test is the one you can run right now.

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Install the free HEIF Image Extensions and open the HEIC photo again

The first download is free, and for many PCs it is the whole fix.

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Pay for HEVC Video Extensions only if HEIC photos still fail to open

The second download costs money, and not every PC needs it.

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Switch the iPhone camera to Most Compatible to stop new HEIC files

Change the format on the phone and Windows never sees another HEIC.

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Set Transfer to Mac or PC to Automatic for the HEIC photos you have

One iPhone setting fixes the library you have already shot.

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Convert a folder of HEIC photos on your own PC, not on a website

Converting is the answer when the photos must open where you cannot install anything.

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Pick a HEIC fix by whether it must work on other PCs too

Sorting by "Works on other PCs" separates a fix for this machine from one that travels.

Fix Cost Effort Covers old photos Covers new photos Works on other PCs
HEIF Image Extensions Free One install Yes Yes No, per PC
HEVC Video Extensions About $1 One install Yes Yes No, per PC
iPhone set to Most Compatible Free One setting No Yes Yes
Transfer to PC set to Automatic Free One setting Yes, on USB transfer Yes Yes
Batch converting to JPG Free Per folder, every time Yes No Yes
Camera to Clipboard Free to try One app each end Yes Yes Yes
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Install the free extension, or switch the iPhone to JPEG for good

Which fix wins comes down to two questions about your photos.

Common questions about HEIC photos on Windows

How do I open a HEIC file on Windows?
Try double-clicking it first, because many Windows 11 PCs already display HEIC. If that fails, install the free HEIF Image Extensions from the Microsoft Store. Some photos also need the paid HEVC Video Extensions, which costs about a dollar.

How do I stop my iPhone taking HEIC photos?
Go to Settings > Camera > Formats and choose Most Compatible. The iPhone then records JPEG photos and H.264 video, which every version of Windows opens. Photos already taken stay in HEIC.

Does converting HEIC to JPG lose quality?
Slightly, because JPEG is lossy too and the image is re-encoded once. At normal quality settings you will not see the difference on screen. The same photo as a JPEG is usually about twice the size.