Deleted files aren't really wiped clean from your hard drive. Anyone with basic knowledge of data recovery can "undelete" them. When you are ready to recycle, reassign or trade in your desktop, ensure data is properly erased with HP Disk Sanitizer, External Edition.
This innovation permanently erases data using a U.S. Department of Defense Algorithm,1 eliminating the need to purchase third-party software to erase files. Disk Sanitizer is free software available for download and will work on select HP business PCs launched from 2005 on.
This system may require upgraded and/or separately purchased hardware and/or a DVD drive to install the Windows 7 software and take full advantage of Windows 7 functionality. See http://www.microsoft.com/windows/windows-7/ for details.