Windows Error Reporting

Error 1606. Could not Access Network Location :.

I can't install or uninstall a lot of software (most notorius java runtime) because of that message, I've been searching for solutions over the past few months and nothing solved this problem. Now I'm trying to reinstall steam and that error pops up, it doesn't mention appdata or anything, only :....

Windows administration: How do you track/diagnose errors and app crashes?

Windows administrators: What tools, if any, do you use to track and diagnose error messages and unexpected application crashes?