corrupted hard disk

I drained my laptop without removing the battery bec it's non-removable and I am not on home so I have no tools. So I did it for some reason and then when I booted it up, it now shows no bootable device. BIOS returned to default settings. What should I do? I am no expert. Just a teenager who...

Hello. My system is vulnerable to row hammer during memtest86 test, I've read there's a way to fix this without change hardware: https://en.wikipedia.org/wiki/Row_hammer#Mitigation I looked into my Gigabyte-Z77X-ud3h BIOS, there's tons of memory timing settings, but no one is currently at "64"...