Windоws10 /8.1/ 7 Professional OEM DVD | 64-Bit Genuine, Original Product key+FREE BACKUP USB, REINSTALL REPAIR INSTALL RESTORE TO FACTORY FRESH 
 
This WINDOWS 10/8.1/7 PROFESSIONAL is an original product key 
 
WINDOWS 10/8.1/7 PROFESSIONAL 64-bit SOFTWARE WILL FIX (Blue Screens of Death BSOD) NTLDR is missing and all problems related to Windows 10 Pro 64-bit OS ERRORS. REINSTALL REPAIR INSTALL RESTORE TO FACTORY-FRESH CONDITION ALL WINDOWS 10/8.1/7 PROFESSIONAL. INSTALLATIONS.