A couple of days ago a small window popped up on my computer with something about "NT Authority, System Shutdown and 1073741819" plus quite a bit more but did not have time to get it all. I have run my computer a few times since without any recurrence but only for an hour or so. I have just been looking at other quite old threads on this subject for a possible answer and found it quite alarming what I have read. Because of this I have run "Malwarebytes Antimalware" and "Kapersky TDSSKiller" (both unable to find any problem). Could someone with a lot more knowledge than me have a look at the attached "HiJack This" log please and tell me if I have anything to worry about or if I should investigate it further. Many thanks in anticipation.