InDesign is doing this semi freezing when I place or replace images.

InDesign is doing this semi freeze thing when I place or replace images. Random images and random formats. The background task hoop turns on and I can do somethings sometimes but not always. If I close everything then close the program there is a message but it's up for a half a second, disappears and then a new start window opens then refuses to do anything else. I have to "End Task" to get it to close. I've deleted tempfiles, uninstalled and reinstalled, turned off GPU, and did that Ctrl + Alt + Shift thing.