GRUBx64.efi wasn't deleted on EFI partition, I finded it in fedora folder in EFI partition, I used CMD on Windows 10 and I copied from fedora folder the grub file to boot folder, then I restarted my computer and pressed F2 and I added to UEFI menu the grub file, finally I could access to the grub and I could select fedora OS. Fedora 35 goes black during dnf update won't boot properly Ask in English dnf magic (Magic Display) November 8, 2021, 1:34pm #1 Hi All, during a dnf update (using Fedora Linux (5.14.16-301.fc35.x86_64) 35 (Workstation Edition) the pc screen blacked out and pc quasi went dead. Press any key to boot from CD or DVD or. Press any key to boot from USB 8) Set your language, time and keyboard, then click Next. 9) Click Repair your computer at the bottom left. 10) Click Troubleshoot > Startup Repair > Windows 10 step by step. 11) Windows should then scan your computer and fix the problems it detects automatically. To write the Fedora Workstation 35 ISO image to the USB thumb drive, run the following command: $ sudo dd if =Fedora-Workstation-Live-x86_64- 35 - 1.2 .iso of = / dev / sda bs =1M status =progress conv =noerror, sync. The Fedora Workstation 35 ISO image is being written to the USB thumb drive.