free space is the space on your hard drive where theres no filer/folders written onto it (not unallocated, thats different)

just like they have free space cleaning in many programs, im sure theres an optimization/defrag of it.

personally, i use AUSLogic's free program for defragging the entire hard drive (including free space)

My first defrag software were Diskeeper but dead so i moved on O&O defrag but O&O got a flaw when electricity cut-off( my country does that a lot) while defraging the files that in process might get renamed into some sort of codename aliens to me. I wonder if it was fixed now, currently using UltraDefrag since its simpler and faster. you can check it out at filehippo for defrag softwares like ultradefrag, o&o, and others freeware but great software.

Edit: Actually, just read this... http://www.auslogics.com/en/newsletter/archive/how-to-schedule-defragmentation/
Not sure if there's a setting in there to always defrag and optimize, but if there is make sure it's checked.


You could use the Windows Task Scheduler and have it run nightly/weekly whatever. Make a .bat file and put "shutdown /s" (I think that's the command to shutdown) in there. Then make another task and have that run the batch file an hour or so after the defrag (or however long it takes). Set your conditions to whatever you want (only run if idle for x minutes). If you do that though, make sure there aren't any programs that are keeping your computer from going idle or it'll never happen.