It means that this PC has NO administrator accounts at all! When the UAC prompt is missing the YES button and there is no option to enter an account or password it is a VERY bad sign.
it differs from the OP's one in that it has a box to enter the password for an administrator account. This is the UAC prompt I see when running the genuine Adobe download signed in as a standard user. I meant is the flash genuine as it should come via updatesFor non-MS browsers like Firefox you still have to install Flash.
