Thanks for taking the time to meet with us and discuss the open
positions earlier this week. Although you have a lot of relevant skills
and experience, they are not an exact fit for this particular position
and so we have decided not to proceed with any additional interviews.
I wish you the best in your future endeavors.
So, I need to send a thank you letter to them for the interview, and see if there was anything specific I could have done better, or known better. I suspect that my windows experience wasn't as in-depth as they wanted.