Hi, I know this is a old thread but I have the same problem. I have deleted all the photos from my C:\Users\Username\AppData\Roaming\Microsoft\Windows\AccountPictures. I put the default image in there from C:\ProgramData\Microsoft\Default Account Pictures, which is the one I want to use temporarily. The other folder mentioned is empty. I changed my online image to the default one but I still get the old image on my PC. This is fundamental stuff, it should be right click- delete or a "Remove Account Image" button. Any Ideas please guys.