Unknown user account has taken control of many documents and media files. How to remove this user.

We created an unknown accout on my laptop Windows 7 did it probably a malware or some kind of virus. This unknown account took all permissions including the special permission. In this way, he blocked my access to a lot of my documents and multimedia files. This unknown account does not appear in the list of user accounts. Thus, it cannot be deleted or modified/restricted. I tried to detect this virus/malware microsoft security essentials and MacAfee antivirus programs. The two could not detect something. Any help?-ERC

Hi CED,.

Thanks for posting in the Microsoft Community.

I'm sorry to know that you are facing a problem of unknown account. It would be useful that you can answer these questions to help you further.

1. How do you know that it is an unknown account? You receive messages or error codes?

2. where are the documents and multimedia files stored?

3. have you made a recent software or hardware changes to the system?

If you are referring to an unknown account with a SID string, then try these steps and check if it helps.

a. go to the folderwhere you saw this string SID.

b. right-click and select Properties. Click the Security tab.

c. If it is there, then click on the Edit button, then click the Remove button.

If you are told that you cannot delete this account because it is to be inherited, and then close the dialog boxes and set up a folder in the tree and repeat the procedure. Keep this up until you can remove the ""unknown account " SID in the permissions dialog box."

You can also check the suggestions provided by Marilyn O, moderator of the Forum on July 9, 2012 and check if it helps.

How to remove an unknown account on the Security tab in windows 7?

Important: The above link contains steps to modify the registry. However, serious problems can occur if you modify the registry incorrectly. Therefore, make sure that you proceed with caution. For added protection, back up the registry before you edit it. Then you can restore the registry if a problem occurs.

For more information, you can view the article:

Back up the registry

I hope this helps to solve the problem.

If you need further assistance, please answer and we will be happy to help you.

Tags: Windows

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