I meant fresh win 8.1 greek install and then upgrade to win 10. I got the "free space" error. I saw somewhere that you can upgrade from Greek to English just doing a registry trick. I'll try that.
you dont need to have the same language for upgrade the w8.1 to w10 you can upgrade with en-us w10 iso and after if you wish make a fresh install with en-us w10 iso like i do.I upgrade my windows 7 pro x64 greek to windows 10 with en-us iso and i dont have any proplem try and you the same.
yeah that i do first time and next i download the lang normal from optional features put it download waiting restart done ..xD