This is riskier but sometimes the only option for very old systems.
If you are unsure about your exact system details, I can help you find the correct download path. Please let me know: What is the of your computer case?
Restart your computer and repeatedly press F2 , F10 , or Delete to enter the BIOS menu.
Do not guess. Download a tool like or HWiNFO . Look at the "Mainboard" tab. You need three pieces of information: