If your PC won’t boot into Windows because of a BIOS corruption or failed update, use this method.
: Restart your computer and press F2 repeatedly at the Dell logo to enter BIOS settings. Look for "BIOS Version" under System Information .
The system will automatically restart and begin the flash process. during this time. Option 2: Update via USB (F12 Menu) Format a USB drive to FAT32 . Copy the BIOS .EXE file to the drive. Plug the drive into the OptiPlex 390 Go to product viewer dialog for this item. and restart. Tap F12 at the logo and select BIOS Flash Update . Select the file from the USB and follow the prompts. Dell BIOS and UEFI Update Download and Installation Guide dell mih61r mb 100971 bios upd
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use a BIOS for a different Dell system (e.g., OptiPlex 790) — wrong checksum will fail. If your PC won’t boot into Windows because
Dell provides two primary methods for updating the BIOS.
Always back up your important data before a BIOS update. The system will automatically restart and begin the
Once downloaded, double-click the executable file. Windows will ask for permission to make changes to your device. Accept, and the BIOS flash utility will launch. Follow the on-screen prompts and click "Update" or "Flash". Your computer will restart and the BIOS update will proceed automatically.