Here I just tried printing an image in my pdf. I've tried the following
- Makings sure there are no typos in the file
- using: tools > PDFLaTeX
- doing changes to the root folder in MikTeX settings
It seems that the tex file does find my png. If I change the name of the image file such that it is incorrect, then the console gives me an error: "file xxx not found". But if the file name is correct, I get the 'file not found' window.