I booted up my PC, selected a movie file I wanted to delete and tried to delete it. Windows said that the file is in use (even though it isn't, I think I would know if I was watching a movie) and wouldn't delete it. My PC then starts chugging badly. I closed windows explorer and checked the task manager. As you can see from the first pic, explorer is using almost 100% of the CPU and a shed load od RAM.
I leave it for a while, namely because my PC is practically out of action, to see if it clears up. As can be seen from the second pic (on the next post), 20 minutes have passed and it is still just as bad. Notice how, in neither picture, explorer is running. What on earth is going on?