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Files with the .ZZZ extension contain files that have been securely deleted by computer optimization software. The erased files name and extension are changed to ZZZZZZZZ.ZZZ, which increases security by ensuring that the original name and extension no longer exist.

The software that operates in this way is called CCleaner. The program allows for the optimizing of computers by clearing register logs, deleting unused files and programs, as well as reorganizing the system start procedure.

Windows

.aawdef Ad-Aware Definitions Format
.abr Adobe Photoshop Brush Format
.ac$ AutoCAD Undo Info Format
.acc DR DOS - ViewMax Format
.acl Microsoft Office Automatic Correction List
.acs Microsoft Agent Character Structured Storage Format
.ad After Dark Screen Saver Format
.add Microsoft Dynamics AX Developer Documentation Format

Last updated

.mmf 04/13/2023
.mup 04/13/2023
.itl 04/13/2023
.scs 04/10/2023
.crypt 04/10/2023
.pnp 04/10/2023
.tap 04/10/2023
.btr 04/03/2023