It looks like you’re asking about a feature or description for a file named microsoftdart10x64engiso new — likely referring to Microsoft DaRT 10 (Diagnostics and Recovery Toolset) x64 English ISO.
Here’s a clear feature list you can use for documentation, a website, or release notes:
The standard distribution method for DaRT is via the Microsoft Desktop Optimization Pack (MDOP). This software is not free; it is typically available only to volume licensing customers (Software Assurance) or MSDN subscribers.
When you download DaRT from official Microsoft sources, you download an installer. To create the ISO (which the search term suggests):
.iso file.Access and modify the registry of the installed, unbootable operating system. This is critical for removing rogue malware entries or fixing corrupted driver registrations.