Does Reinstalling Os Affect The Uefi/bios?

I installed a different operating system than the one that came with my computer. In order to do so, I removed the hard drive and replaced the hard drive. Right now I am having trouble getting into the UEFI/bios so that I can flash the bios. However, the popular keyboard keys that do that don't seem to be working-- F1, F2, F10, F12, enter. Could the change of hard drive have affected this?
I also don't see the option to get in there, from Windows ("settings" and then selecting a few more options lets you select UEFI, normally).

 

Not in any way

 

Make, and model of system board please.

Have you tried "Delete"?

 

The computer came with Windows 10 pro. I purchased the computer as a refurbished computer. The sticker on the computer says Windows 7 pro because when it was sold as a new computer that's what was on it. I installed Windows 8.1 pro.

 

IS7XM. I think the brand is Lenovo.
I didn't try the delete key yet.

 

The 'enter' key is now working. I don't know why it didn't work before.

I wonder why I can't enter the UEFI from within Windows. Maybe that is part of one of the Windows 8.1 updates (it's a brand new install now; and I don't have any of the updates)?

 

You have to enter the BIOS/UEFI before Windows boots. You cannot do so from within Windows.

 

With Windows 10, if it's a UEFI GPT installation, you can set a reboot that will go directly into the UEFI.
If it's a so called "legacy" installation, you can't do that - the option is not available.

To Boot into UEFI:
go to: Settings (Winkey+I) > Update & Security > Recovery > Restart Now

When the restart begins, choose:
Troubleshoot > Advanced Options > UEFI Firmware Settings > Restart


To see if the installation is Legacy or UEFI:
go to: System Information > System Summary
Look at BIOS Mode. If it shows UEFI, then you have access to the additional options.
If it shows Legacy, then the UEFI restart won't be available.

In Disk Management, go to View menu > Top > Disk List
Partition Style column is either MBR or GPT

 

@mjnc The OP has 8.1 but the system originally had 7. Good info for 10 users.

 

I read that in post #5, and then quickly forgot.
Thanks for setting that straight.
Glad you're still in the same solar system.