You can automatically log on to your NT machine by applying the following Registry patch to your system.
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A word of caution: This leaves a BIG security hole, especially if your autologon ID has administrator privileges. In addition, your password is now saved in clear text in the Registry. Use this only if you have a good reason (like the need to autoinstall software, for example). And, as always, remember that Registry edits can be risky; be sure you have a verified backup before you begin.