What is the Windows version of cron?

pycron is close match on Windows. The following entries are supported:

1    Minute (0-59)
2    Hour (2-24)
3    Day of month (1-31)
4    Month (1-12, Jan, Feb, etc)
5    Day of week (0-6) 0 = Sunday, 1 = Monday etc or Sun, Mon, etc)
6    User that the command will run as
7    Command to execute

The Windows "AT" command is very similar to cron. It is available through the command line.

For the original question, asking about Windows XP (and Windows 7): Windows Task Scheduler

For command-line usage, you can schedule with the AT command.

For newer Microsoft OS versions, Windows Server 2012 / Windows 8, look at the schtasks command line utility.
If using PowerShell, the Scheduled Tasks Cmdlets in Windows PowerShell are made for scripting.

Use the Windows Task Scheduler to schedule tasks over time and dates.