I'm on Windows 8 and I was thinking the other day... does Microsoft have a database that logs our Windows SIDs, login names, and computer names? This data would presumably be collected from Windows Error Reports. I have however read that Microsoft uses unique hashing and/or GUIID's (not SIDs?) to categorize and separate data from one system and another. For public debugging of Windows event errors, warnings, etc. -- is it safe to share one's Windows SID, including login and computer names?