Erasing a hard drive WELL on a machine with Windows 7 and 8

OK, I have two laptops, I'll sell, a HP Pavilion g7 with Windows 7 and a 2000 HP with Windows 8. I want to make sure that no personal info is left on them. I used the function "reset" on the Windows 8 machine and I used on the Windows 7 machine recovery disks. Some of what I saw online, that should be enough, but others say I should also use Windows Eraser, or something like that, make sure that no programs recovery software can recover all the data (if the person I have to sell is be a techie).

... And some say just to use the computer strongly without putting any personal information on this subject and it will make all previous data unrecoverable thereon, but does not say how strongly or for how long to use a computer to ensure that all personnel in this regard is unrecoverable.

So what is the answer? I don't have the recovery disc for the computer of Windows 8, I guess that I had to get a part or do some before using a hard drive eraser.

Thank you

Qathe2013

Hi Qathe2013,

Let me first answer your last question: in most cases, yes you will need your recovery disc or you will end up with a computer without an operating system.  However most manufacturers, including HP, put another partition on the hard disk with a file recovery: what you need to reinstall the operating system.  Depending on how it is configured, this additional partition on the hard drive may or may not appear when you browse your files and folders in Solution Explorer, then you might need to make sure that the manual.

As to the "use the computer heavily and no info cannot be recovered", it's just about the fact that computers are still using re-use of space available disk and overwrite the old regions on the disk.  After a few re-writes the original data cannot be recovered using costly and sophisticated same restoration processes.  But you have no way of knowing if your real personal data was really erased.

I will say that for most, just format the disk is enough.  I might personally feel safe with that I don't have - or even just using the function to reset the PC in Windows 8.  However, this does mean that a sufficiently motivated person were able to restore the bits of information I have.  So a program that replaces empty space on the disk with random data (sometimes referred to as "zero-ing" the disc) would put you at ease.

I would also say long you can get your hands on the recovery CD (or make sure that the recovery partition exists), you can go ahead and clean the drive, reinstalled Windows itself and sell the PC.

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