Windows 7 Lost boot menu

It seems like you're encountering boot issues with your dual-boot system after a motherboard replacement and some changes made with EasyBCD. Here are some steps you can try to resolve the boot problem and recover access to your Windows 7 installation: 1. Repair Windows Boot Configuration: - Boot from your Windows 7 installation disk. - Go to "Repair your computer" > "Troubleshoot" > "Advanced options" > "Command Prompt". - Use bootrec command line tool: - Restart your computer and check if you can boot into Windows 7. 2. Use EasyBCD from Linux Mint: - If you have access to Linux Mint, you can try to use EasyBCD from there to restore or configure the Windows 7 boot entry. 3. Reinstall Windows 7 Bootloader: - Another option is to perform a startup repair from the Windows 7 installation disk, which you've tried. You may need to find a way to navigate that repair menu without mouse/keyboard support. - If you have a PS/2 keyboard or mouse, try using that instead of USB. PS/2 devices might work where USB ones fail in this scenario. If these steps don't resolve the issue, you might need to consider a clean install of Windows 7. Make sure to back up your important data before attempting any repair or reinstallation to avoid data loss.