Flip your laptop over and find the sticker. You need the exact model number (e.g., NH70FAT , P775TM1-G ).
If your BIOS says "EC: Unknown," you likely skipped the EC update step. Flash the EC firmware immediately. clevo laptop bios update
Ensure your drive controller is set to AHCI or RAID, depending on your previous setup, to avoid "No Bootable Device" errors. Flip your laptop over and find the sticker
Most Clevo flash tools require a small USB drive formatted to FAT32. depending on your previous setup