Friendly HTTP Errors Are Not

Debugging ASP pages? Then friendly HTTP errors will drive you mad.

Friendly errors will show you something like HTTP error 500 - server error, instead of
Active Server Pages error 'ASP 0126' Include file not found. Needless to say, the latter is much more helpful.

This is easy to turn off within IEs advanced settings. However, minds greater than mine have decided I don't need access to that tab.

If this is the case for you, simply run RegEdt32 and look for the following value name: Friendly HTTP errors. It should live under [KEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]. Change the value to NO, exit RegEdt32 and restart IE. You may also have to dump your browser cache.