|Read it Completely to understand it..|
Drive wiper Actually doesn't wipe out the data from your Disks..!
The deleted data from you Hard Disk actually remains in the Disk unless and until it is replaced by any other file.. These deleted data can be restored using various methods and even can be restored using software's such as Recuva..
To get rid of this thing..i.e. to erase those deleted files completely from the Hard Disk so that it can never be recovered back, we use Disk Wipers.. And the Same Functionality is provided by AVG DISK WIPER..
Their are various 3rd Party Applications to do the Same thing.. One of it is CCLEANER.. Most of the users use these applications to wipe their disks and thus keep there private deleted data safe from being recovered again..
Also wiping the disk, increases the performance of your computer by about 1%..