M mattd68 Member Joined Nov 29, 2019 Posts 23 May 19, 2020 #1 Hi, I try to upgrade a laptop from Windows 7 to Windows 10 with the official Windows Media Creation Tool, everything seems OK and then the computer reboot and start the installation of Windows 10. But after some hours I go back to the laptop and he was block on the Windows 10 start.. I let him go and after 1h the computer go OFF.. I power on but I got this message: undoing changes made to your computer The computer restart several time but in this loop, he cant repair Windows 10 installation but he cant go back to Windows 7 I tried to boot from USB and repair Windows 10 but he doesnt work.. Somebody can help me to go back in Windows 7 or forced go to Windows 10? I got a lot of programs installed.. Actually I clone the HDD to another and I can try some tips if you have :) Thank you !