Image upload permissions problem I have my local site running on my Win 7 machine using Acquia Dev Desktop.

I also have a "live" version of the site.

In both environments I cannot upload an image for an article. I must have messed something up because it was working several days ago. 

This link https://www.drupal.org/documentation/modules/image was useful, but the suggestions on Troubleshooting/The image doesn't show up didn't fix the problem. I'm sure it's because I don't really understand what I'm doing.

I'm wondering if a disable of the image module then a re-enable would solve the problem?
Have you checked Home » Administration » Configuration » Media
IN this Public file system path should be "sites/default/files" and Temporary directory should be "/tmp".
And check whether you files folder has read/write permissions and its subfolder's where you are saving image.