I keep my HD as clean as possible. I use CCleaner, registry cleaners, and Auslogics disk defragger regularly. I remove all unnecessary startup items. But the system wasn’t as fast in starting up or shutting down as I wanted it to be.
I ran Recuva, a file recovery utility, and it listed over 4,800 deleted files, most of which were not recoverable. So I then ran CCleaner with the “Wipe Free Space” option enabled, and then ran Eraser, which also wipes cluster tips in addition to free space. Recuva now showed only about a tenth as many files.
Now startup and shutdown take about half as long.
Does anyone know how startup and shutdown times could possibly be affected by wiping free space?
Maybe this will work some magic for you even if we don’t know why.