windows 7 - How can I automatically keep folders clean?

I've just wiped my laptop and am starting to move files back on to it now. How can I keep certain folders clean automatically? For example, is there an easy way to automatically deletes all of the contents in a folder older than 2 weeks, and have this process run daily? That would really help in keeping things like my downloads folder from filling with junk.

This is on Windows 7 64-bit.

Answer

You create batch script that deletes content of download folder. And then create windows version of cron and run it on designated intervals.

Batch to delete contents of my folder.

FOR /D %%i IN ("D:\myfolder\*") DO RD /S /Q "%%i" DEL /Q "D:\myfolder\*.*"

Delete folders older than N

forfiles -p "C:\what\ever" -s -m *.* -d  -c "cmd /c del @path"

Forfiles documentation: http://ss64.com/nt/forfiles.html

And cron for windows:
http://support.microsoft.com/kb/308569