I want to share a folder to other LAN-computers.
Have Windows10 Home with all updates.
When checking the users for that shared folder I discovered an unknown user ... how do I remove this guy?
<Okänd kontakt> is just Swedish for <Unknown contact>
When an unknown account is listed in permissions it's usually due to the file or folder having had permissions for a user account on this PC that has since been deleted. Or, if the drive is an external drive that is used by several machines, an account that exists on another PC.
Either way, as the unknown user doesn't exist on this PC then having it listed in permissions doesn't grant access to any account that actually exists.
Thanks ... but can I get some additional information about this Unknown contact so I can check what has happend to him?
Not really, the most you will be able to find out is the Security Identifier (SID) of the account. All permissions for a file or folder are linked to an SID, but for SIDs that are known on this system the 'friendly name' will be shown. It's only when the SID doesn't match any known account on this PC that you'll see 'unknown user' there.
For a file/folder with unknown user(s) you can see their SIDs if you right-click on it, select Properties, then look on the Security tab.
If you click the Edit button you can also remove them, but as I said it does no harm just to leave them there.
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