OptiPlex 7040 – 2015 (6th generation Intel Skylake) UEFI BIOS with Secure Boot.OptiPlex 7020 – 2014 (4th generation Intel Haswell) UEFI BIOS with Secure Boot.OptiPlex 3010/7010 – 2012 (3rd generation Ivy Bridge) UEFI BIOS with Secure Boot (only with the latest UEFI BIOS Update).OptiPlex 390/790 – 2011 (2nd generation Sandy Bridge) UEFI BIOS – No Secure Boot, there is no option for Legacy ROMs as these are always Enabled.The UEFI BIOS and GPT partition scheme should be used where possible with Windows 7 64 Bit. You may or may not have these technologies depending on the age of your system. Part 1: Determining whether your System Supports UEFI and Secure Boot Dell Systems Older than 2010 – Legacy Preboot Diagnostics (Bootable USB)Īnd attempt data recovery to an external hard drive using Fedora before proceeding:.If you have not backed up your data and you have came to this guide because your system cannot boot. This will perform a clean installation of Windows 7 64 Bit removing all data on your system's drives.
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