The same exact thing happened to me on Jan. 29th, 2015. This number showed up on my caller ID on my comcast home phone. When I called it back using the *67 feature to block my identity and the area code and number, the little stupid message came on that said the number you have called is not valid.
I have gotten several calls from this number which I haven't answered. I finally answered this morning in an effort to get them to stop calling. Some guy with an Indian accent telling me my computer with a Windows operating system had an error message. I told him I didn't have a computer with a Windows operating system. He said, yes you do. I hung up. Seems like a scam.