Active Directory GUI tools (AD Users and Computers, Sites and Services, etc) are installed on every Windows 2000 and 2003 server regardless of whether or not the server is a domain controller. When the server is promoted to domain controller status, the shortcuts are just added to the Start Menu. To launch the tools without the shortcuts (e.g. from Start>Run) you need to know the filenames of the tools:
CurrPorts displays the list of all currently opened TCP/IP and UDP ports on your local computer. For each port in the list, information about the process that opened the port is also displayed, including the process name, full path of the process, version information of the process (product name, file description, and so on), the time that the process was created, and the user that created it.
When you try to connect to server by fully qualified domain name (FQDN) which resides in top level domain (TLD) that has a purely numeric suffix, connection is failed. If server is domain controller issue also affects establishing trusts and domain joins.
If you dual boot with Windows and Linux, and have data spread across different partitions on Linux and Windows, you should be really in for some issues.
When running Windows Update in Windows Server 2003, Windows Update may fail with the error code 0×80190191. This could be caused by the winHTTP Web Proxy Auto Discovery Service.
WinHTTP implements the client HTTP stack and provides developers with a Win32 API and COM Automation component for sending HTTP requests and receiving responses. In addition, WinHTTP provides support for auto-discovering a proxy configuration via its implementation of the Web Proxy Auto-Discovery (WPAD) protocol.