Lightroom :: Main Image Greyed Out Or Not Showing At All?

I have been using lightroom 4. At first it decided that the center image just wouldn't display on some photos. The previews look fine, the selected photo preview seemed to work, but the center image would just gray out like there was no photo at all. I tried to uninstall several things, updated my video drivers, even changed virus protection just in case but nothing worked.

I have the creative cloud, so I uninstalled version 4 and upgraded to version 5. Went into my catalog and almost exactly the same thing started happening. This time, I can see unedited photos, but if I apply a preset the image disappears again. If I click off the photo and click back I can see the image unedited in the main window and the previews show it with the edits. Sometimes I can see the edited photo but at low resolution, but it will not sharpen up to the full image. I even cleared my preview cache just in case but nothing seems to be working.

I don't want to have to re-install windows just to try fix this.I should not that the only thing that changed is that I installed a new Epson printer in windows. I have now uninstalled all but the driver for that printer and still have the issue.