Just found a huge list of HR codes... BTW, let me explain the type of information I publish here. It's not exactly a blog, it's rather a  public notebook, where I put the stuff I want to be at hand, and if somebody else will find it useful, so better! And yes, I know, there is error lookup in Visual Studio, but when you investigate a test machine or a customer computer, you don't have Visual Studio at hand, but you usually have Internet...