I recently installed Windows 11 from a USB created with Microsoft's official Media Creation Tool on a Lenovo desktop using an Intel Core i5-6500. There was no Rufus image, registry bypass, or other workaround, and the installation completed normally. These systems are older, stand-alone production machines that only run lightweight tasks, so I was planning to upgrade them to 16 GB of RAM and keep using them for a while. In the past, I usually treated 8th-generation Intel as the minimum for Windows 11 and saw unsupported-hardware warnings on older machines. Has anyone else successfully installed Windows 11 this way, and are there known problems with updates or later feature upgrades?
4 Answers
A clean install can behave differently from an in-place upgrade. The installer may accept the machine if it has UEFI, Secure Boot, enough memory and storage, and a usable TPM, even though the i5-6500 is not officially on Microsoft's supported CPU list. Upgrade tools and some feature updates are more likely to enforce the processor requirement.
Some Lenovo systems from that generation shipped with TPM 2.0, although it may need to be enabled manually in the firmware. That could explain why one model installs successfully while another similar-looking system does not. Secure Boot and UEFI settings are also worth checking.
The machines are Lenovo desktops with the TPM enabled, so that may be the deciding factor. They are only being used for light, non-critical workloads.
The installation working does not make the hardware officially supported. An i5-6500 is outside the supported Windows 11 processor list, so Microsoft could refuse future feature upgrades, limit support, or allow updates to fail. I would use this as a temporary option for low-risk systems, not as a long-term production standard.
I've seen older systems install successfully but later remain stuck on an older Windows 11 release because feature updates failed. Reimaging or applying additional upgrade workarounds may be necessary when that happens.
There is a lot of variation by installation media version and hardware configuration. Some older machines have worked for years, while others stop receiving feature updates or fail compatibility checks later. Test the exact Lenovo model, confirm activation and driver support, and keep a current image or replacement plan before deploying these broadly.
That matches what I'm seeing. These are fresh installs from official Microsoft media, not modified images, and the machines work normally after installation.