Uninstalling from a Command Prompt:
If you cannot start Windows Me but you can start your computer to a command prompt, use these steps to uninstall Windows Me:
Start your computer with the Windows Me Startup disk that you created during Windows Me Setup. If you do not have a Windows Me Startup disk, you can use a Startup disk that was created on any other Windows Me-based computer. To create a Windows Me Startup disk, use any other Windows Me-based computer to follow the instructions in the following Microsoft Knowledge Base article:
267287 How to Create a Startup Disk in Windows Me
At the Microsoft Windows Millennium Startup menu, choose the Minimal Boot option, and then press ENTER.
At the command prompt, type c: and then press ENTER.
Type cd windows\command and then press ENTER.
Type uninstal.exe and then press ENTER.
You receive several warning or confirmation prompts. For each prompt, press Y, and then press ENTER to continue. This process can take several minutes.
EDIT: If you can't make a Windows ME boot disk, you can do so from
here.