Using IE11 with W10 is madness. Microsoft finally admitted that Internet Explorer is, and always has been, a totally pathetic browser and introduced something (Edge) which is, at least marginally, better to go with W10. So if you really must use a Microsoft browser (WHY? WHY? WHY?) use something decent such as Firefox (which is what I use) or Chrome or Avant or Vivaldi or . . . the list goes on!
Even so, 'long running script' problems with AB seem always to be associated with the ads on here, which is why so many people use ad blockers.
Obviously the Ed doesn't like that (because its the ads which pay for this site) and I, for one, will be perfectly happy to disable my ad blocker on AB as soon as the problems stop occurring. Hopefully the new, all-singing, all-dancing version of AB, which we've been promised for ages, will finally get to grips with the problem and then everyone can be happy. Until then though there seems to be no other way to get the site to function properly (at all times and with all browsers).
AB not only needs ads, it also needs users to be able to access the site in the first place!