A Clean Install of Windows 10 TH2 - Video Tutorial

OptiPlex GX620 – Windows 7 and 8.1 64 Bit

This model and Operating System is not supported by Dell.

Legacy BIOS

See Updating the BIOS.

Hardware Upgrades

CPU Upgrade – for WIndows 8.1 64 Bit compatibility

SSD – Solid State Drives

RAM – Random Access Memory

Its recommended to upgrade to 4 GB of RAM:

Refer to the User’s Guide when upgrading components.

Windows OS

For best results Clean Install wiping all partitions:

OS Updates




Follow instructions here for using the Microsoft Update Catalog then follow instructions here for driver installation via the device manager.

Dell Backup and Recovery

Only install if you have a larger than a 120 GB SSD/HDD

Note this system won’t be able to boot from a Rescue Disk (external hard drive) so make a Factory Backup (Bootable USB Flash Drive).

5 thoughts on “OptiPlex GX620 – Windows 7 and 8.1 64 Bit

  1. How can I get the SATA Driver for this? I want to install Windows 7 on the OptiPlex GX620. Thanks in advance.

    1. I have Windows 10 32-bit installed on mine and everything works and runs very well. I haven’t tried 64-bit but the system is limited to 4GB of RAM so there’s no reason to (and it would run slower anyway).

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