Philip_Yip
5 Iridium

RE: Upgrading OptiPlex 780 machines to Windows 10 from 7

The OptiPlex 780 was released in Late 2009. Most would have been sold in 2009-2011 and with 4 years warranty standard, pretty much all units have expired warranty. Dell therefore are extremely unlikely to allocate resources to testing this model.

However the OptiPlex 780 is a robust Intel machine. Pretty much all the system drivers will be inbuilt into Windows 10 TH2 for it.

Make sure all systems are on Legacy BIOS revision A15:

http://dellwindowsreinstallationguide.com/updating-the-bios/

This system doesn't have UEFI and SecureBoot.

Then made a Dell Backup and Recovery 16 GB USB flash Drive (using the latest version):

http://dellwindowsreinstallationguide.com/dell-backup-and-recovery-1-8-1-71/

Then you can proceed with the clean install (recommended) or upgrade install (not recommended):

http://dellwindowsreinstallationguide.com/download-windows-10-oem-and-retail-iso/

When making a Bootable USB use the MBR partition scheme for legacy BIOS.

Some additional tutorial videos are here:

https://www.youtube.com/playlist?list=PL1RkaknDn7v-Ucth4gt0U3BHVSY7oNkWr

Others have reported successful installs:

http://en.community.dell.com/support-forums/desktop/f/3514/t/19645888

Dr Philip Yip
Tech Enthusiast and Author of the Unofficial Dell Windows Reinstallation Guide

Windows FAQs and OEM Downloads


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