Running a job everyday (scheduling)

Question

Hi,

In my e-commerce, every night at 10.00 P.M., I want the system to generate a report of newly registered people and

the amount of the sales of that day etcand email the report to the administrator. 

I want this happen on a regular basis without any human  intervension. Is there any way I can achieve it?

I got the following link to use windows services:-

http://msdn.microsoft.com/en-us/magazine/cc163821.aspx

but, I don't know how to run it and I downloaded the following sample

http://www.codeproject.com/KB/aspnet/ASPNETService.aspx

but, it worked only once. I wanted the job to happen every day at a specific time.

Thanks,