Classic 7 is Windows 10 LTSC cosplaying as Windows 7

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Uncanny rebuild resurrects the 2009 desktop, complete with support, updates, and licensing questions

For those who miss what Windows looked like in 2009, Classic 7 is a heavily modified version of Windows 10 IoT LTSC, reworked to make it look as much as possible like Windows 7, while still being in support and receiving updates.

This has been
accomplished thanks to a large compilation of skins, themes, add-ons,
tweaks, and so on – some of which are real components from older
versions of Windows, adapted and modified to run on Windows 10.

We were not sure whether to cover Classic 7, because while it is impressive and fun, we are not at all sure it is legitimate to use. But we can see a target audience.

This isn’t just a layer of makeup; it’s more like a face transplant.
It includes some real binaries from Windows 7, and indeed earlier
versions, adapted and grafted onto Windows 10. One component is the
Windows Media Center from Windows XP, which was cut
from Windows 10 before release.

The specific version of Windows 10 that it’s modified is significant.
It’s Windows 10 IoT LTSC. We talked
about this specific edition in April 2025 because it’s the last
version of Windows 10 that is still in support and receiving updates. The standard Windows 10 Enterprise LTSC release will continue to receive updates until 2027,
and the IoT edition, which is only available in US English, will get
updates until 2032 – so this is the longest-lived version of Windows 10.

At the bottom of our story on Windows 10 LTSC, we mentioned the
slightly shady world of third-party modified editions of Windows.
Classic 7 is one; it’s a modified version of an Enterprise edition of
Windows, one that’s only available for legitimate licensing via a Volume
License Agreement. Unless you have appropriate volume licensing for the underlying Windows edition and have paid the fairly hefty
fee, this is an unlicensed copy of Windows. So we have to spell out that
this is not for production use, and you should not use it in
any working environment. It’s an interesting hack, though, and it might
be a bit of fun for a home gaming machine or something like that. 

As an
aside, one of the most widely used tools for activating unauthorized
copies of Windows and Office, MassGrave, is in fact hosted
on GitHub. In other words, Microsoft itself is hosting tools to
activate unlicensed copies of Windows and Office. Whether that counts as
tacit approval, we wouldn’t like to say.

Classic 7 has been under construction for over a year and a half, and
it’s the sequel to an earlier project called Reunion7 – also hosted on GitHub, as it
happens.

As its list of
credits shows, Classic 7 is in part a compilation of a lot of
existing tools. Some of them are relatively well known, such as Winaero Tweaker, which can run on any copy of Windows and, among lots of other options, allows some of the
less desirable changes in the Windows UI to be undone – for instance,
switching to the hidden Aero Lite theme.

Classic 7 includes this and a lot more besides. We could identify some of the couple of dozen credited projects, such as the Aero11 theme, itself a port
of Aero10 to Windows
11. This works alongside OpenGlass, which
brings Aero-style transparency to Windows 10.

There’s also the Windows NT
Modding Utility, and another hack that lets you change the Windows
version number reported on the command-line, called Custom CMD
Version Text. Multiple sub-components come from the Windhawk mods collection, some
credited to a developer called ImSwordQueen, whose themes
can be seen on
DeviantArt.

Other components are more than just cosmetic. For instance, the
remarkable description of Explorer7:
“explorer7 is a wrapper library that allows Windows 7’s
explorer.exe to run properly on modern Windows versions,
aiming to resurrect the original Windows 7 shell experience.” So this is not merely a theme for Windows 10 Explorer: as far as we can tell,
it’s the real Windows 7 Explorer, but running on top of 10. The same appears to apply to Control Panel as well, thanks to the Control
Panel Restoration Pack. Thanks to the Windows
Media Center (Modern Hardware) effort, this is the real XP version,
which an on-screen message says replaced the Windows 8 version used in
an older build.

We tried Classic 7 in VMware, and the experience is quite uncanny. We
did hit some glitches: our first installation failed when we let it do
its own disk partitioning. Deleting all the partitions, manually creating a single large C: drive, and telling the installer to use that worked. A few error messages did
appear here and there. Trying to change screen resolution went badly
awry until we installed the VMware guest additions. Opening Windows
Update just threw an error.

Overall, though, it is genuinely remarkable. It looks and feels
like Windows 7 – but in principle, you can run the latest apps and drivers and
they should work. It even includes your choice of older Firefox versions,
including version 115 ESR, skinned to look exactly like Internet Explorer – an effort called BeautyFox.

Last year, we wrote a piece on running
Windows 7 in 2025 and it really reminded us how great the
2009 release looked compared to anything that’s come since. Apparently,
that late-noughties translucent look is now known as Frutiger
Aero, and frankly we miss it.

In all honesty, we feel Classic 7 goes too far. We don’t want
Help/About dialog boxes, and even the winver tool and
the ver command to lie to us. We’d prefer something that
told the truth, but looked pretty while doing it.

But as we wrote last year, some personal friends are still running
Windows 7 by choice, and compatibility is starting to become a
problem. If you want a recent Firefox, well, you’re out of luck. Firefox
115 from 2023 still works, and remarkably, it’s still
getting security fixes now: the March end-of-life has been postponed
again, and it’s currently
August 2026. The Irish Sea wing of Vulture Towers is still running
it on OS X 10.13 and it works flawlessly.

This is a way out: to keep the 17-year-old vintage look, while
running a codebase that still has another five years in it. If you’re
that determined, it’s an option… and it’s undeniably an attractive GUI.
Whether this unauthorized rebuild of an unlicensed OS is an attractive
option, though – you must decide that for yourself. ®