Windows7 delete unknown account tutorial

On our computer, sometimes there are some unknown accounts. For those accounts that don't know the origin, in order to protect our system security, we usually delete it. So what do you do?
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Delete Unknown Account Method:
1. First right click on any folder to select the attribute. In the opened property interface, switch to the “Security” option. Card;

2, then click the Edit button under the Security tab page, then click to select the unknown account, then click Delete;

3, if the unknown account is assigned to the previous folder Permissions, click on the delete will see the following prompt, this time you need to go to the folder properties of the previous level to perform the above steps to delete the unknown account.

If you have some unknown accounts on your computer, then delete them in this way, which will make your computer more secure.