Delete undeletable files from NTFS file system
Sometimes you cannot delete files on an NTFS file system, for example if the file contains a space at the beginning or end, or has a reserved name. Deleting the file gives an error: "The filename, directory name, or volume label syntax is incorrect.". Here's how to fix it: use "internal" commands.
The "SendUsing" configuration value is invalid.
The classic ASP error "cdo.message.1 error 80040220 The "SendUsing" configuration value is invalid" is an error message indicating your ASP script (website) can't send its email out, or the IIS SMTP service is configured wrong. Here is how to fix the latter issue.
Inexplicable COM+ error messages
"The run-time environment has detected an inconsistency in its internal state." Over time, on a number of web servers (Windows 2003, IIS 6.0), with many running application pools, I noticed many - at first inexplicable - COM+ error messages.