Although the title is a question, I'm not asking for a fix because I've found this http://productforums.google.com/forum/#!topic/chrome/grLEVNi9dfw I've since removed GC & that XP has been returned to the owner. I've explained to the users mother she'll have to use Firefox is she needs to download vids from youtube. The above link is what happened to me yesterday. I had a few tabs open in GC & as I went to open another, it forced the xp to reboot. No warning,no nothing. I got angry & removed all traces of GC but reinstalled it because the users family thinks there is no better browser. Thank you.