New user account created automatically

[foffa 0]

I have Windows 7 ultimate 64-bit  and from the last week each time when I login a new user account is created. After I delete it at each start is make again, with different name. Any how the most used name is duplicating my username for example(foffa1)(foffa2). My antivirus (ESET Smart Security 9) says that my computer is not infected. 

 

Thanks

[Marcos 5,070]

Couldn't it be that you enabled Anti-Theft?

[foffa 0]

i'm already enabled anti-theft and it's created new user account named [John] its fake user for the thief , but what i'm talking about is the windows keep creating new user account automatically and duplicating my admin account username [foffa] to [foffa1] [foffa2] [foffa3] its not duplicating the anti-theft user standard account.

 

but after i deactivate anti-theft , the windows working normal and everything is fine ..no more new user account created automatically

 

that's strange so, do i have to deactivate anti-theft to solve this problem?

 

and i'm sorry for my bad grammar 

Edited August 14, 2016 by foffa