Interested users can download the official PC Health Check app from Microsoft's Windows 11 website. The updated version was released for Insiders exclusively some time ago this public version of the tool is now available. The company pulled the tool shortly thereafter, and promised that it would release an updated version of it before the release of Windows 11.
The tool was available to Insiders only, and checked, if the PC it was run on was compatible with Microsoft's Windows 11 operating system. Microsoft released its PC Health Check tool when it announced Windows 11 officially. The new version of Windows will be released on October 5, 2021.