When I display the file security tab ( right click on file > properties > security tab) then, under "Group or user names" I see, on 2 lines, the item "Account Unknown(S-1-5-21-4286123312-2729574813-374...). I've not seen this account item before and my immediate concern is that my system has been hacked and compromised.
If I try to remove/delete the account then I get the message:
You can't remove Account Unknown(S-1-5-21...)because this object is inheriting permissions from its parent. To remove Account Unknown(S-1-5-21...), you must prevent this object from inheriting permissions. Turn off the option for inheriting permissions, and then try removing Account Unknown(S-1-5-21...) again.
Does anyone recognize if this account might be valid or have I indeed been hacked?
Thanks,
Ian
If I try to remove/delete the account then I get the message:
You can't remove Account Unknown(S-1-5-21...)because this object is inheriting permissions from its parent. To remove Account Unknown(S-1-5-21...), you must prevent this object from inheriting permissions. Turn off the option for inheriting permissions, and then try removing Account Unknown(S-1-5-21...) again.
Does anyone recognize if this account might be valid or have I indeed been hacked?
Thanks,
Ian
