The decision to support Windows RT follows Samsung’s earlier announcement that it will back another version of Windows. It’s a boon to Microsoft’s effort to use multiple versions of its flagship Windows operating system to challenge Apple Inc. (AAPL) in tablets. Microsoft suffered a setback last week when Hewlett-Packard Co. (HPQ), the world’s largest computer maker, said it won’t back Windows RT from the get-go.

For more, check out this Bloomberg story.