1. Check the file format: first confirm the format of the photo file. If the current system or application is not supported, it cannot be opened. Common image formats are JPEG, PNG, BMP, etc. You can view the format in the file properties and open it in the corresponding software. If the file format is wrong, you can use related software to convert it.
2. Try to open other photos: If only one photo can't be opened, you can try to open other photos to see if there is the same problem. If other pictures can be opened normally, there is something wrong with the photo.
3. Rename the file: Sometimes the file name is too long or contains strange characters, which will also make it impossible to open it. You can try to change the file name to be easy to understand.
4. Open the latest backup: If it is an old photo or downloaded from the Internet, it may be damaged or have problems. You can try to open the latest backup or download it again.
5. Use the photo preview program: You can use the photo program that comes with Windows or other third-party software (such as Picasa and IrfanView). Some photo software can repair damaged files.
6. Repair files: You can also use some repair tools, such as Recuva, PCInspectorFileRecovery, EaseUSDataRecoveryWizard, etc.
To sum up, if the computer photo can't be opened, you can check the file format first, try to open other pictures, rename the file, open the latest backup, and use the picture preview program or repair tool to repair it.