How can I remove the 15-second wait when performing unattended Windows XP and later installations?

A. After the text/Windows Preinstallation Environment (WinPE) portion of a typical installation, you might have noticed that the system waits 15 seconds before rebooting. To remove this wait period for unattended or automated installations, you can edit your deployment file and under the "\[Unattended\]" section locate the

WaitForReboot=Yes

entry. Simply change this entry to

WaitForReboot=No

and save the file. The installation will no longer wait 15 seconds before the reboot.