Purchased in January 2023.  It has been working great since purchase--although the battery needed replacement, but no big deal--until I returned to the laptop one afternoon and the screen was blue.  I got the dreaded Blue Screen of Death.I tried reloading Windows but to no avail.  Tried rebooting and restoring; nothing works.  Tech support wants $99 for assistance.  I'd really like to know what causes the BSOD in the first place, because this thing was working fine until...all of a sudden.