bootcfg timeout
Changes the operating system time-out value. Windows commands reference
On Windows
Windows
bootcfg /timeout <timeoutvalue> [/s <computer> [/u <domain>\<user> /p <password>]]
To use the bootcfg /timeout command
bootcfg /timeout 30
bootcfg /s srvmain /u maindom\hiropln /p p@ssW23 /timeout 50Identify/timeoutSpecifies the timeout value in the [boot loader] section. Windows commands reference/timeout <timeoutvalue>Specifies the timeout value in the [boot loader] section. The <timeoutvalue> is the number of seconds the user has to select an operating system from the boot loader screen before NTLDR loads the default. The valid range for <timeoutvalue> is 0-999. If the value is 0, NTLDR immediately starts the default operating system without displaying the boot loader screen./s <computer>Specifies the name or IP address of a remote computer (don't use backslashes). The default is the local computer./u <domain>\<user>Runs the command with the account permissions of the user specified by <user> or <domain>\<user>. The default is the permissions of the current logged on user on the computer issuing the command./p <password>Specifies the password of the user account that is specified in the /u parameter./?Displays help at the command prompt.