Need help! I'm almost at my wit's end.
Upgraded a friend's GL552J laptop (the BIOS detects the motherboard as GL552JX).
RAM: From 1x4GB to 2x8GB DDR3L RAM,
SSD: installed an additional SSD in the M.2 slot (Kingston A400 SATA SSD - 240 GB, M.2 form factor).
Although I managed to boot, and even...