Working on a dell inspiron 1545. Starts normal but will not load windows. Runs for a while and sends me to a screen that says windows failed to load and gives me two options launch windows start up repair or start windows normal. F2, f12, and f8 all work. It was doing this before got it running but it would freeze after loading. Ran it in safe mode and woked fine but after I did that stated not loading windows again. Any ideas what would becausing this.