One can significantly improve system performance by using drive cleanup software to clean your PC system. Your computer can perform better, regardless of computer type, if there are less files that need to be sorted and backed up on the computer in question. Any spare space that is recovered as a result of the cleanup procedure will of course increase load times for files that remain. And when doing a defrag the outcome is improved when the system has lots of free space to shuffle files around in. And with your private files cleared out the possibility is limited that they can be misused by anybody else.

Two possibilities exist for cleaning a hard disk; firstly you could delete files by hand, or secondly you can use an automated tool to do the job. Cleaning the drive manually means examining by hand, the file folders and deciding which of the files are no longer needed, and removing them whenever necessary. This procedure is much more thorough than automated methods but can be repetitive and time intensive. You can use software cleanup products that detect info which include file properties, last opened dates, etc. and use this information to build a table of files and folders that can be safely deleted.