Thanks. I decided to do what you said(more or less) and made a bootable usb drive with Windows 10 using WinToUSB and Windows Media Creation Tool(to get ISO Image). Strangely, it didn't show up as the usb in the F12 menu. But something weird happened: While I had the USB drive plugged in, I decided to boot Windows from the menu. Usually it would give me the security boot fail screen, but instead it booted Windows on my hard drive! It did a disk check and repaired a file or directory called "System Partition". However, when I tried safe-ejecting my usb drive, it said it was being used, and I realized it was also very hot (intense use). It can be that the usb disguised itself as my Windows installation, and then booted into my Windows partition. After a few minutes I safely ejected it, with Windows still running. I will run the BIOS flash utility from Acer and will update this reply to tell how things worked out, for anyone who has the same problem. Thank you for your reply!
The update went smoothly, and then booted into Windows. I decided to reboot, and found that I couldn't access the F12 menu(disabled in BIOS at default). But, I got a similar error message, but only about grubx64 - unable to open - not found. Security boot fail. I decided to check things in BIOS. Sadly, it still asked for a password. But by using the code it gives you at the end, I was able to access the BIOS. I found that pretty much all the settings I could change, and that the supervisor password was still set. Oh well, but at least I had access again. I cleared security boot settings and trusted everything under ubuntu. Then I disabled secure boot, for safe measures. I enabled f12 and then saved and exit. I immediately pressed f12, so I don't yet know what happens when I let it be, but that all matters on my boot order. I booted "Windows", and sure enough, as it used to always do, it booted into my GRUB menu. From there I could boot into ubuntu or Windows. I booted into windows since I'm not ready to face the slew of errors that I might get when I log in lubuntu. Everything works pretty much perfectly. If someone has the same problem, I'm entirely sure myself how I fixed it.
If you are reading this because you have the same problem and you're an idiot like me, then you probably didn't know that the unlock password that you enter once you try entering the password 3 times, is set as your supervisor password. I'll explain:
When press f12, it may ask you for a password. If it does, and you didn't enter the right one after 3 times, it will give you two options. Select the first one. There, It will ask for a "unlock password". There is a string of numbers in brackets after. Go to bios-pw.org and enter that code. The site will give you the unlock password, enter it. That password you just entered has become your supervisor password. Now you can reset your supervisor password using that code as your "current" password.
first of all check if the default audio playback device is the speakers, then check this discussion:
This is completely normal, that the laptop doesn't work on full power while not charging. It doesn't work on maximum capacity while not charging, because the battery will be drained within minutes if otherwise.
It's probably a power setting set to low in nvidia control pannel for when on battery.
I'm playign fine on battery untill I reach the power saving charge level on the battery, then yes, the performance drops.
And no, you can't drain a 88Wh battery in minutes, you would have to drow 800watts or something and it's just not possible.