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How to Wipe Your Hard Drive Before Selling / Disposing Your Computer

If you are trying to get rid of your computer, chances are that it will contain some sensitive information on it.

For example:
  • employment and payroll records
  • family and holiday photos
  • business documents
  • visa applications
  • resumes and job applications
  • lists of passwords
  • passport and driver's license scans
  • tax documents
  • bank statements
  • sexualized content of you or someone you know
What you may not know is that merely deleting files doesn't remove them from the hard drive and in the hands of a wrong person, they can recover those data from your hard drive.

What you want to do is wipe your hard drive clean, and this tutorial will show you how to do it.

Note that this article only covers Windows 10.

How to Wipe HDD

Old fashioned HDDs can be easily wiped using Windows's own functionality. But you need to make sure to do a full format. Follow the steps below.

Start the Format Tool

Screenshot of the Format option in the right click menu on hard drives in Windows.
Right click on the hard drive partition you want to wipe and select the Format... option.

You don't want to wipe the partition with Windows installed on, because that would delete windows as well. Nor would Windows allow you to format that partition. So choose a partition that Windows is not installed on.

For the Windows partition, we'll reset it later.

Do a Full Format

Screenshot of format options on Windows.
Select NTFS file system and make sure the checkbox for Quick Format is deselected. Then click Start to start formatting. This will take a while.

After you are done, everything on the partition will be wiped clean. Do this for every partition you want to wipe.

To be certain, format the partitions 3 times each.

How to Wipe SSD

SSDs are more complicated. So you might want to to use a disk-management software made by the SSD's manufacturer. Find out which manufacturer your SSD is from and follow their instructions.

How to Reset the Windows Partition

As said earlier, Windows won't allow you to format the hard drive partition that Windows is installed on. Instead, what you want to do is reset your windows.

Start the Reset This PC Tool

Click the Windows start button and go to Settings > Update & Security.

Screenshot of Reset PC setting in WIndows 10.
Select the Recovery menu item from the side bar menu and click the Get started button under the Reset this PC section.

Remove Everything and Clean the Drive

Screenshot of remove everything option in the Windows 10 Reset PC functionality.
In the Reset this PC wizard, choose Remove everything.

Screenshot of the clean the drive option in the Windows 10 Reset PC functionality.
In the next screen, choose Remove files and clean the drive.

After that, just follow the wizard if the process doesn't start. If the process starts, you would be logged off, and Windows would start to reset the hard drive. It will take a while to finish.

After it's finished, you would have a fresh Windows and your personal files would be wiped from the Windows partition.

End

By doing all of this you would have wiped your computer clean and you can give away / throw away / sell your computer without worrying about your data.

But if you are really worried about the data, then I would suggest to puncture some holes in your hard drive rendering it unusable and then throw it away.

The same principle applies to smart phones: make sure you wipe the data clean before selling it!

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