Here is a little tool I wrote to delete files older than X days in windows, in linux we have several ways for doing that but I couldn't find any easy solutions on windows, so I opened up my Visual Studio and it took me about 5 minutes to write it.
As I think this tool can be useful, I'm sharing it, use it at your own risk.
I'm also sharing the source code, it is stupid but feel free to improve it, just remember to send me a copy of the improved version.
DelOldFiles.exe (requires .NET 2.0)
Source Code (Visual Studio 2008 project)