BIOS AND UEFI

[dragoncurt]

Changed the laptop from uefi to bios and now can't get into the normal windows 8.1 OS. I have tried to get back into the uefi but wont let me. Thanks

[derick90]

Did your boot device somehow change?

[dragoncurt]

1 minute ago, derick90 said:

Did your boot device somehow change?

Yh I had to change it do boot from usb. but now says no os installed 

[derick90]

And just to be sure, You do have the Windows 8.1 iso on the USB right?

[dragoncurt]

1 minute ago, derick90 said:

And just to be sure, You do have the Windows 8.1 iso on the USB right?

Oh no. it is my sisters laptop and she can't log into win 8.1 . So I am getting windows password unlocker but it did not let me go onto usb in  uefi so had to do it in bios so that loaded but because I changed it, it does not let me see the os. 

[Guest]

UEFI is simulating a BIOS, which means it's trying to use a Master Boot Record on your disk. Did you try inserting Windows recovery media (DVD or USB) and using the recovery tools to automatically fix it for you?

 

EDIT: Just saw your last post. Did you try resetting your CMOS?

[swordsman247]

Just now, dragoncurt said:

Oh no. it is my sisters laptop and she can't log into win 8.1 . So I am getting windows password unlocker but it did not let me go onto usb in  uefi so had to do it in bios so that loaded but because I changed it, it does not let me see the os. 

Sounds like you need to reformat the driver and do a clean install.

[dragoncurt]

5 minutes ago, adamjp said:

UEFI is simulating a BIOS, which means it's trying to use a Master Boot Record on your disk. Did you try inserting Windows recovery media (DVD or USB) and using the recovery tools to automatically fix it for you?

reformat what driver? thanks