PC booting into BOIS every 2nd boot

[Mr Breaker]

so i just upgraded my tower, plugged everything in how it was before apart from my blue-ray CD-ROM (dont use it any more)

now when i boot up, the 1st attempt will load into windows fine, but if i press restart, it boots up into BOIS and the mouse does not work as if its locked up. but i can see the time in the corner ticking away. so i know its not locked up. so i press the power button on the case, it the restarts back into windows.. And the cycle repeats.

Any ideas? surely it cant be the old CD ROM drive?

[_I_]

unplug all usb devices, other than k/m

[PopinFRESH]

Provide the details of the hardware.

Motherboard & BIOS version specifically; but also any add-in cards, etc. as well. What you are describing can happen for a few reasons; such as the CLR CMOS/NVRAM jumper being set incorrectly, or some instability in the configuration causing POST to fail during the reboot and booting to BIOS/UEFI with defaults/safeboot.

When it boots you into BIOS check if you are able to navigate by keyboard if the mouse isn't working. If so then you are likely booted into a bios safeboot; if not then something (likely something with an option ROM, such as GPU, NIC, etc. is causing the EFI to hang). The clock in BIOS isn't going to be a good indicator of if it has "locked up" or not. The RTC can still be functioning if EFI has passed control to an option ROM which is hung/firmware crashed.

[Elucidator]

Yes, it it could very well be the efi bootloader. I am guessing windows for some reason updates the next boot to make you go to bios instead of windows.
try fixing the boot configuration data store
https://www.lifewire.com/how-to-rebuild-the-bcd-in-windows-2624508

if that doesn't help, see if you can access the efi shell directly from within the bios, if not, you will need to prepare a usb with an efi shell.

you can use the efi shell interface to figure out what the efi bootloader is doing.

[andreasaspenberg575]

it could be your battery. though i am not sure.

[_I_]

引用自 andreasaspenberg575：

it could be your battery. though i am not sure.

dead cmos battery would just reset to defaults, it should still boot with that

but then, it would only reset to defaults when the psu is off, or loses power for a few minutes

[[-iD-]]

this happened to me every time my OC broke over the years. even if you aren't ocing, the voltages or cpu could be a problem.

[PopinFRESH]

引用自 -iD-：

this happened to me every time my OC broke over the years. even if you aren't ocing, the voltages or cpu could be a problem.

Yep this was the second example I was talking about. It fails to POST and will reset and safeboot into BIOS/UEFI with the "safe defaults".

[Mr Breaker]

引用自 PopinFRESH：

Provide the details of the hardware.

Motherboard & BIOS version specifically; but also any add-in cards, etc. as well. What you are describing can happen for a few reasons; such as the CLR CMOS/NVRAM jumper being set incorrectly, or some instability in the configuration causing POST to fail during the reboot and booting to BIOS/UEFI with defaults/safeboot.

When it boots you into BIOS check if you are able to navigate by keyboard if the mouse isn't working. If so then you are likely booted into a bios safeboot; if not then something (likely something with an option ROM, such as GPU, NIC, etc. is causing the EFI to hang). The clock in BIOS isn't going to be a good indicator of if it has "locked up" or not. The RTC can still be functioning if EFI has passed control to an option ROM which is hung/firmware crashed.

my motherboard is a gigabyte ax370 gaming 3 BIOS is F41a (2019)

I did have a wifi card via PCI slot. but i dont use it any more so i removed it. would it be worth putting back in?

i dont think it would be a CLR CMOS/NVRAM jumper cause my PC worked in the old case, and no jumper were touched more over.

[Mr Breaker]

引用自 Elucidator：

Yes, it it could very well be the efi bootloader. I am guessing windows for some reason updates the next boot to make you go to bios instead of windows.
try fixing the boot configuration data store
https://www.lifewire.com/how-to-rebuild-the-bcd-in-windows-2624508

if that doesn't help, see if you can access the efi shell directly from within the bios, if not, you will need to prepare a usb with an efi shell.

you can use the efi shell interface to figure out what the efi bootloader is doing.

So i tried to follow the steps inthe link, but it asks me to boot up in Advanced options and select Command prompt. But i dont have that option. i only have "start up settings"

[Mr Breaker]

OK never mind guys, i fixed it. one of the bootable drives wasnt set to UEFI but legacy instead. But if it wasnt for you suggested i wouldnt have gone down the path to look into UEFI, so thanks yall!