Welcome to Wise PC Cleaner
SmartPCFixer is a system tool, and it has a function on cleaning disk that names Disk De-Frag. It is convinced for people to clean and defragment a lot of files on the disk from your computer. You can use Disk De-Frag to delete the remaining files or registry, and SmartPCFixer will give you a hand and it could also tell you how to defragment the disk fragments by an effective way. Afterwards, you will find the disk space becomes larger than before.