The best error messages are simple, explain the problem, and how to fix it. It's frustrating to see 'Windows Update failed: Error code 0xXYZABC123' - that's no

The best error messages are simple, explain the problem, and how to fix it. It's frustrating to see 'Windows Update failed: Error code 0xXYZABC123' - that's no help to me. Or see an error about 'A problem occurred trying to do this and that' with no recourse. A better approach is "There was a problem saving your file. There may not be enough disk space free. Try deleting files you don't need anymore to make more space," (etc) that gives the user a way to try and fix it without being so frustrated. I'm guilty of some useless error messages, but I try and make sure any error messages I write from now on try to be helpful to get the user back on track to what they wanted to be doing.