About Tier1 following process sheet, it's normal, about having to call and not re-called from Acer...i don't know they procedure but not normal on my side too.
If drivers were working and not now...honestly i would re-install windows after a good diskpart clean all.
If you got a root kit and BIOS is compromised, you will notice after windows new installation too (but i think you already know it as msft) and so you got a confirmation.
If drivers were working and not now...honestly i would re-install windows after a good diskpart clean all.
If you got a root kit and BIOS is compromised, you will notice after windows new installation too (but i think you already know it as msft) and so you got a confirmation.