Colliders no longer working and overlapping objects

First of all, my colliders in the editor are no longer working. They did last week, but I had my script and scene open when my computer died. I have no idea what was lost, if anything. The colliders are not created by the script, but just bluntly in the editor. Also, an ongoing problem I've had is overlapping objects when they move fast. I am moving the objects with the mouse, and they still overlap at times. Even the DoNotGoThroughThings script isn't working for this.