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How do you specify more than one occurrence using the "AT" command e.g.

run xxxx.exe every 20 minutes

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Instead of AT use a scheduled task.

In Windows 7 / 2008 use the Task Scheduler (under Administrative tools)

Pre Windows 2 / 2008 go to Scheduled Tasks (also under Administrative tools)

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scheduled task - I hate them :( – James Jun 14 '11 at 21:35
@James Why? They do exactly what you're looking to do? – squillman Jun 14 '11 at 21:41
The at command is actually just an interface to the Task Scheduler... and not a particularly powerful one. – jcrawfordor Jun 14 '11 at 22:14

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