1. write a simple batch file.
some thing like this(saved as myprog.bat)
sqlldr userid=scott/tiger@connect_string control=c:testmyload.ctl

Note:
myload.ctl is the control file.
which will call the data file (the flat file which contains the data to be  loaded).

2. establish a connect_string in your pc.
   ( i.e, install oracle client, edit your tnsnames.ora
    so that it connectst to the database in server).
3. save the above script as a .bat file.
4. using windows scheduler schedule the above .bat file to run in regular intervals as u want.