Completely Delete Sensitive HDD Data

[LoveOverClock]

I am going to sell my laptop, i already format it and did a clean install of windows but if the buyer of the laptop use a program like recuva he can restore back a lot of my data.
How i can completely delete this data and make it unrecovable?

 

[rgd1101]

ccleaner have a disk Wiping tool
http://www.piriform.com/docs/ccleaner/using-ccleaner/wiping-free-disk-space

 

[captaincharisma]

the best way would be to find a program that will zero out all the space on the hard drive but even then there might be a way to still retrieve lost data. if you are too paranoid about it i wouldn't sell it and just keep it as a spare

 

[ss202sl]

DBAN - can write over entire disk multiple times. The only drawback it it takes a while depending on the size of the disk.

 

[USAFRet]

As above, DBAN.
Unrecoverable aside from the geek shop at Ft. Meade.

Then reinstall the OS.

 

[iamacow]

The only way to completely delete sensitive data is to crush the drive, that is what the NAS does. Your second option is to run DBAN. You should have it overwrite it 10 times otherwise it can be recovered. It's scary how easy it is to recovery data that isn't wiped more than a few times. If someone really wanted to get at it they could.

I've done it a few times before, it's fun to look into someone else life once in a while.

Next time leave your drive encrypted and than you won't have to wipe it more than once to make it impossible to recover.