Does it have to be a png? If you can open it on your other computer, try saving it as a .psd file on to a flash drive and then open it on your new computer so you can at least keep working until you get an answer for why.
I know that's not the answer you were looking for, but it's just a practical work around until you find out the answer.
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To me, that type of error seems like one of the following:
- a corrupted file
- It's a different type of file, just named .png. Someone could have renamed the file extension without actually converting the file. For example, they took file.jpg and just renamed it file.png
You have a very valid point, thank you!
I understand what you are trying to say, but as I have said - this opens perfectly on my other laptop. So the possibility of it being a corrupted/different kind of file would be zero.
Why not rebuild it? Open it in the laptop that will take it.
Make a "non-destructive change" such as toggling q on your key to enter/exit quick mask. That makes it a changed file.
Save it and try opening it in your other PC
Sorry, I missed the part where you said it opens fine on your other computer. If you transferred it from one computer to the other it's slightly possible it could have been corrupted, but that is unlikely.
Does this happen to all PNGs, or just this one?
Have you tried saving the file as a PSD (Photoshop document) on your other computer and see if that opens? You could then try saving it as a PNG on the "problem" computer and see if it works. The idea is that you need to figure out if it's a problem with your file, or your installation of Photoshop.
One other thought--
When you have the "Open" dialog box open -- there is a little drop down menu at the bottom. Change the selection to All files, an see if you can open the png.