There is no legal "original gratis" version from Corel. The only official free versions are:
I understand you're looking for CorelDRAW X3 in Spanish for Windows 10. However, I must inform you: There is no legal "original gratis" version from Corel
CorelDRAW X3 introduced several groundbreaking features that are still the foundation of modern vector design: PowerTRACE: There is no legal "original gratis" version from Corel
If you need a reliable vector graphic editor for Windows 10 without breaking the bank, consider these options instead of fighting with X3: Inkscape (Free): There is no legal "original gratis" version from Corel