Disks tools and registry

• Disk Cleanup (cleanmgr.exe) is a tool to clean up files in the Recycle Bin, Temporary Internet files, Download files, and Temporary files.
• Disk defragment (dfrgui.exe) is a tool to optimise and defragment drives.
• Defragging a hard disk drive (HDD) rearranges bits on the drive, making files load faster.
• Defragging a drive too frequently can decrease its lifespan.
• Trimming (SDD) ensures that the NAND memory chips on an SSD are worn evenly to maximise the lifespan of the drive.
• Trimming an SSD involves taking the chips on the drive and ensuring the files are evenly placed on the drive.
• Registry editor (regedit.exe) is a database that stores all the settings and configurations for Windows and its applications.
• The Registry editor can be launched using the regedit command.
• Editing the registry can corrupt the OS or make programs stop functioning.
• HKEY_CLASSES_ROOT stores file association information.
• An example of a key in HKEY_CLASSES_ROOT is .DOCX is word.
• HKEY_USERS stores settings that apply to all users.
• HKEY_CURRENT_USER stores settings for the current user.
• HKEY_LOCAL_MACHINE stores settings for all hardware and software installed on the system.
• HKEY_CURRENT_CONFIG stores settings for individual devices when multiple of the same type of device have been installed.