оптимальный вариант - psexec

KOLCHOZ_POSTEVENTЕсть такая муторная комманда at. - уже вытеснена schtasks.
Windows XP HelpTo schedule a task that runs once

Syntax
schtasks /create /tn TaskName /tr TaskRun /sc once /st HH:MM [/sd StartDate] [/it] [/ru {Domain\]User [/rp Password] | System}] [/s Computer [/u [Domain\]User [/p Password]]]

Remarks
In the run-once schedule type, the /sc once parameter is required. The /st parameter, which specifies the time that the task runs, is required. The /sd parameter, which specifies the date that the task runs, is optional. The /mo (modifier) and /ed (end date) parameters are not valid for this schedule type.

Schtasks does not permit you to schedule a task to run once if the date and time specified are in the past, based on the time of the local computer. To schedule a task that runs once on a remote computer in a different time zone, you must schedule it before that date and time occurs on the local computer.

Examples
To schedule a task that runs one time
The following command schedules the MyApp program to run at midnight on January 1, 2003. It uses the /sc parameter to specify the schedule type and the /sd and st to specify the date and time.

Because the local computer is uses the English (United States) option in Regional and Language Options in Control Panel, the format for the start date is MM/DD/YYYY.

schtasks /create /tn "My App" /tr c:\apps\myapp.exe /sc once /sd 01/01/2003 /st 00:00

- и т.д. (Пуск-Справка и поддержка-schtasks)