“An operating system wasn’t found” error when booting Windows When trying to boot Windows, you receive the error: An operating system wasn’t found Try disconnecting any drives that don’t contain an operating system Press Ctrl+Alt+Del to restart
Error Loading Operating System in Windows 10 - Solved Now! Step 3 Press F10 to save changes and restart your computer Method 2 Fix hard disk errors via Windows CHKDSK tool CHKDSK is a Windows built-in tool to gauge the general health of your hard disk It can check hard drive for errors and fix bad sectors and errors if any Step 1 Insert the Windows 10 installation CD DVD to your computer and boot from it Step 2 Choose your keyboard layout
windows 10 - Error loading operating system from USB - Super User If this is the case there could be a number of problems ranging from incorrect file system format (NTFS vs FAT32 vs EXFAT), are you choosing to boot from USB in your bios, Are you trying to boot in EUFI mode which you are confusing with BIOS (Sometimes you will have an option to go into "Legacy Mode" , and much more