Good Morning, Thank you very much for your fast answer.
This is my problem:
1-Upgrade to win8 directly from win7(upgrade), not a clean install. I got some music production hardware that windows 8 its not supporting anymore(drivers), so decide to revert to win7.
2-Start the win7 installation process, all steps of partition pass well, but in the next windows.
Installing Windows
Copying windows files
Expanding Files ....... 0%..... fails in this step.
3-The error code is: Windows cannot install requiered files. Error 0x80070001
4-My mobo is GYGABYTE- ga-h55m-s2h its a little old 2 or 3 years old, but works very well with win7. In motherboard bios setup, cannot find the option to turn off secure boot or UEFI setings, and BTW cannot install win8 clean neither.
Thank you very much for your help.