Ahh, Windows Automatic Update. As if the manual windows update wasn't annoying enough, now Microsoft gets to decide which packages are on your computer without consulting you first, and nag you if you opt not to install the service. Here's how to disable that annoying, destabilizing little popup in the corner of your screen. I've only tested this on Windows 2000.
1. Log in as Administrator
2. Open the Control Panel
3. Open Administrative Tools
4. Open Services
5. Right click on Automatic Updates in the panel, and select properties.
6. Select Startup Type: Disabled
7. Repeat this with Background Intelligent Transfer Service
Windows Automatic Update will trouble you no more!