This article explains how to boot your Windows Dedicated Server in a different mode.

If you're having problems, for example, you can start your server with the last good configuration.

You can also use the serial console to boot Windows with the last known good configuration. Usually during the boot process, you should press [F8]. This is slightly different with the Sercon.

During the boot process, press [Esc] and then 8. A selection menu will appear. Select Last Known Good Configuration.