How to UEFI mode? Based on Computers

Your bios may be set to AUTO detect. This means it looks at the first boot device and decides whether to present you with UEFI bios or LEGACY(MBR style) bios. So its determined by the contents of your hard drive or other boot device. Once set to AUTO and if you have a UEFI drive then you wont be allowed to alter settings, EXCEPT by using the OS after you boot. The OS should provide you with UEFI style BIOS adjustments using a program.

try this
on start up get into the bios set up, click on the boot up tab and set the hard drive as first boot followed by and cd or usb stick setting
make sure that you save and changes before exiting

https://blogs.technet.microsoft.com/askcore/2011/05/31/installing-windows-7-on-uefi-based-computer/

bios uefi setting will be causing windows 7 install to fail

please check bios boot type I sujspect it may be booting for UEFI rather than for legacy boot. Windows 8 will boot on UEFI boot type but windows 7 will need legacy bios type of boot up settings in bios
see
http://blogs.technet.com/b/askcore/archive/2011/05/31/installing-windows-7-on-uefi-based-computer.aspx

When it boots back to the uefi bios page there should be some settings tab/s that you can change the boot from uefi only to normal the only other things i can suggest if you dont want to go into those settings to far for whatever reason , when it boots into your bios from uefi mode press f10 or whatever the defualt settings button may be for your bios, make sure you save and exit then aoll should be fine , FAIL THE ABOVE , ITS TIME FOR A BIOS UPDATE !!

best is noobs avoiding UEFI
and 945 is 2005 tech, not modern UEFI bios .at all
but do ask maker this.
but 945 ended there.

I had so much trouble trying to install windows with the UEFI that I ended up disabling it and used normal Legacy instead ,it took weeks trying to find a solution but I didnt find one .

you have to change the settings in bios setup. normally press f2 or f10

restart the computer HOLD the keys CTRL+F11 OR F12 depend of your model, and restore to the factory defaulty, and try it again.
God bless you

Did not see on HP specs. Check the BIOS. There should be an option to change if compatible.