Quick answer
StartAllBack is the Windows 11 product. For Windows 10, the related product is StartIsBack++. Do not install a Windows 11 shell package simply because a search result includes the phrase StartAllBack Windows 10 download.

What matters for this task
The similar names describe different Windows targets, not interchangeable installer labels. A useful first step is to resolve the operating-system mismatch before looking at versions, themes, or troubleshooting advice. This page is a compatibility explanation, not a Windows 10 StartAllBack installer.
Steps to follow
- Run winver to verify which Windows version is actually installed. A familiar-looking taskbar is not proof of the OS version.
- For Windows 10, review the StartIsBack product information and its requirements. For Windows 11, review StartAllBack instead.
- Check existing customization software in Installed apps so that you do not add a second overlapping product inadvertently.
- Before an OS upgrade, record your desktop configuration and review the new operating system and product requirements together.
Verify the result
The product name, Windows target, and installer source should agree. Treat a page promising one universal package for every Windows version with caution.
Limits and rollback
If you obtained the wrong package, cancel before installation. If it is already installed and causing problems, use Windows removal tools rather than renaming files or forcing compatibility settings.
Questions about this task
Can I make StartAllBack support Windows 10 by using compatibility mode?
Do not rely on compatibility mode to change the target of a shell extension. Use the product intended for the operating system.
Will the Download button here install the Windows 10 product?
No. The site download is StartAllBack for Windows 11. Consult the linked StartIsBack source for Windows 10 information.
Primary sources
Publisher claims and Windows procedures are linked below. The comparison and diagnostic steps are editorial guidance, not a claim of hands-on Windows testing.
Windows 11 download · Review compatibility and the publisher’s license terms before installing.
Download for Windows 11 File source and installation notes