aston.exe is a part of Aston Shell replacement. More information can be found here.
Quote: Aston shell is a powerful and flexible shell replacement application.
Unlike many competing products, you do not have to have an expensive
powerful computer to run Aston. Combining high speed and eye-candy it
consumes less RAM, than default Windows shell and needs few processor
resources. It is fast and stable, so you can save your computer's power
for other tasks.
Aston fully replaces standard Windows Desktop and adds numerous new features:
Every attempt has been made to ensure the information about aston.exe is accurate but alot of malware applications try to pose as valid applications. If it is something other than what was posted above please leave some feedback in the forum.