x-box fallout 3 expansion pack?

i loaded the pitt and operation anchorage exp. on my x-box. about 3 hours after my x-box went to hell. i got the green screen and the dreaded red circle. this is the second x-box that has had the red circle (or the red line) that i have owned. x-box is going to fix it but they swear it had nothing to do with the pack being loaded. plus it put all kinds of junk on my x-box that i did not want. has anybody else had problems with the exp.pack. could it have caused it or was it just pure chance that it happened when i loaded the pac. my x-box still has the red when the hard drive and accessories are unplugged