How to boot windows 8.1 on newly made desktop using optical drive?
How to boot windows 8.1 on newly made desktop using optical drive?
Check the SSD setup, install Windows 8.1, follow installation steps carefully.
Start your UEFI setup on the motherboard
Turn off CSM function
Activate Secure Boot (or select "Windows UEFI" on some systems)
Restart using the Windows 8.1 disc
You may be prompted to press any key during boot, try a random button if needed
Click "Install Now"
Provide your language and keyboard preferences when prompted
Input your product key
When asked for customization or upgrades, select "Custom"
Select the disc and create a large partition (or use only part for Data/Games)
A window will appear confirming multiple partitions – choose yes
After reboot, pick a local account or Microsoft account
Configure privacy, security, and update settings as desired
Or opt for the Express option
Congratulations, you're now using Windows 8.1!
They might reside in the Windows partition (often called the C partition because it uses the standard drive letter) or in an additional partition.
Ensure your dedicated graphics card is properly installed. If it fails to boot, remove the graphics card and use the Intel version instead. Re-enable CSM and reinstall the card. The issue stems from outdated firmware—most cards support only BIOS, not UEFI. Updating the card’s firmware to UEFI compatibility is necessary. Manufacturers typically don’t offer this option, so you must handle it manually. Keeping CSM enabled alongside the card can improve boot speed but doesn’t resolve the core problem. Ideally, a physical switch or jumper would simplify the process.
Using USB doesn't necessarily mean you have to turn off the CSM.
CSM pertains solely to graphics card functionality. When you encounter CSM, consider enabling or disabling support for older graphics cards. Currently, every graphics card available—except Intel’s built-in options—is considered legacy. To remove that classification, the card’s firmware must be updated. Detailed steps are available on the manufacturer’s website if your card offers them.