Why Windows warns when you install
The ScreenRhythm installer is not code-signed. Windows SmartScreen shows a blue “Windows protected your PC” window for programs from an unknown publisher. This is the standard warning for a small independent app without a code-signing certificate — it is not a virus report.
What to do
- In the blue window, click More info.
- Click Run anyway.
- Windows may ask for administrator permission — the installer needs it once to install the service and the system-wide filter.
Why the app is unsigned
A code-signing certificate costs money every year and requires identity checks. ScreenRhythm does not have one yet. A certificate removes the “unknown publisher” line, but it does not by itself give a new app SmartScreen reputation — that is built over time with downloads. We will add signing when the product has enough volume to justify it.
How to check the file
- Download only from screenrhythm.com/download.html; do not use mirrors.
- Compare the SHA-256 with the value on the download page. The official installer 1.1.23 has SHA-256
84FF807643E2EF1BCBA817E149779C80D9F82172A5CAD3B9BC23EB19CA05C0E9. - If you want a second opinion, upload the installer to VirusTotal and look at the number of detections, not a single heuristic flag.
- If something looks wrong, write to support@screenrhythm.com before installing.
What the installer does
- Installs the app into Program Files and registers the ScreenRhythm Windows service.
- Adds a tray icon that the child can see.
- Enables system-wide DNS filtering when the parent turns it on.
- Does not read messages, capture keystrokes or take hidden screenshots.
If you are not comfortable
Do not install the app. Write to us and we will answer your questions first. A warning is a reason to check the file, not a reason to ignore security.