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How to format the pc so the end user will not retrieve the data again?

I want to sell my laptop to someone, I want to format the laptop before selling it so he cant retrieve my  critical data, How I can do it?
My laptop is windows 7 OS, Lenovo.

Warm Regards
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Ihab
Asked:
Ihab
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3 Solutions
 
arhcCommented:
Re-install windows again....at the time of installation delete you hdd partitions and format HDD severa times...l
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Neil RussellTechnical Development LeadCommented:
If you REALLY want to erase everything then read here http://www.zdnet.com/blog/storage/how-to-really-erase-a-hard-drive/129

Secure erase is as good as it gets for free. And THEN afterwards reinstall windows.
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rindiCommented:
If you have recovery media for the OS, boot it using the UBCD and the tool DBAN on that CD to secure erase the HD. If you don't have recovery media, but if there is a recovery partition, look for a utility of lenovo that allows you to create such media. Once you have created the media use the tool I mentioned above to securely erase the HD:

http://ultimatebootcd.com

Once the HD is securely erased use the recovery media you created to reinstall the OS.

Neither will deleting partitions nor formatting them erase all traces of data. You must use tools similar to what I mentioned to achieve this.
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cwstad2Commented:
DBAN, very secure wiping app

http://www.dban.org/
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IhabAuthor Commented:
Mr Rindi
I don't understand your post , I want to format the PC and give it to a client making sure everything is erased , I don't want to install any OS
please clarify which tool I will use to erase all data so it is not recoverable

thanks
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cwstad2Commented:
About DBAN
Darik's Boot and Nuke ("DBAN") is a self-contained boot disk that securely wipes the hard disks of most computers. DBAN will automatically and completely delete the contents of any hard disk that it can detect, which makes it an appropriate utility for bulk or emergency data destruction.


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Neil RussellTechnical Development LeadCommented:
The link I sent you to download Secure Erase from ZDNet is all you need then. Will do a secure wipe of the hard disk and make it non recoverable.
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rindiCommented:
Most Clients will want the PC with the OS it was originally delivered with, as most PC's come with a pre-installed OS and an OEM License for that OS. Also most modern PC's, when you buy them, don't come with either, installation or recovery media anymore, but rather have a recovery partition which allows you to return the PC back to the factory delivered state, with just the original OS. If you use DBAN to wipe your HD you'll end up with no OS and no recovery partition. So if you didn't use the utilities that came with the PC to create recovery media your customer would then have to buy a new OS and install that. I don't think he'd be happy with that. So I mentioned that above as a precaution you should take before wiping everything from the HD.

Apart from that I mentioned DBAN before cwstad2 (it is included on the UBCD I asked you download and boot from). Good practice on this site is to accept the first correct answers, and not those that came a lot later and mention the same answer....
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IhabAuthor Commented:
Mr Rindi

I appreciate your answer and thanks for you help, I 'd Like simple answers, I will deliver the laptop no Os, So I don't need to think about the OS for the customer
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IhabAuthor Commented:
Moderator Please open the Question Again
A possible solution added by Mr. Rindi
Warm Regards
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Neil RussellTechnical Development LeadCommented:
Once closed a question should not be reopened for comments added AFTER its closed or questions can go on for ever and ever!
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IhabAuthor Commented:
I agree with you Mr Neilsr but I have to be fair also,
Warm Regards
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Neil RussellTechnical Development LeadCommented:
Fair is the fact you accepted an answer, two infact. You do not then keep on opening and closing questions everytime somebody else posts an idea!
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IhabAuthor Commented:
Happy New Year Neilsr , Enjoy Your Time, Best wishes for you and your family
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Neil RussellTechnical Development LeadCommented:
And a happy new year to you and yours too :D
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IhabAuthor Commented:
Warm Regards
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