Was trying to figure out what the problem was until last BSOD revealed it was kaspersky all along. After uninstalling Kaspersky Security Cloud all problems vanished. Here’s JSFiddle bsod results: Link https://jsfiddle.net/f9sjw4d3 It’s a pity as your antivirus is one of the best. Guess my computer is too old for your product. Amd hd 6750 (with most recent drivers) Intel i5 750 2x 4gb corsair 1600mhz ram i think 650w seasonic focus gold plus Gigabyte p55 ultra durable Samsung 860 EVO 500GB, wd blue 2tb, wd blue 1tb, wd passport 320gb Windows 10 x64 home (19042.867 20H2) Kaspersky version was latest one 21.3.10.391