There is a miscellanious quest called “The Helm of Winterhold” which you get off the Jarl of Winterhold. Near the end of the Companions questline you will get a quest from Kodlak to kill some witches in a cave. It’s avoidable and fixable though and I’m going to tell you how. This bug will basically break the Companion’s questline and the town of Whiterun as well. Ok guys, I’m just writing this short article to warn you about the first serious bug I’ve encountered in Skyrim.