security issue when connecting to secure site please help

[bigjonnyauk]

hi guys well this one has me baffled popped round me mums today cuz she was having comp probs

they are running windows 7 with ie 9

now mum has logged in on her tesco direct account then gone to veiw an order but a pop up keeps appearing saying windows secure and it shows the admin log in screen and asks for a password which does nothing when typed in

just cant get rid of it if anyone can help so this goes back to how it was and doesnt pop up im stumped

 

[bigjonnyauk]

think its a windows thing it comes up saying windows secure security and it looks just like the logon screen when you turn on your comp it says admin then under that there is another blank box saying change user

 

[bigjonnyauk]

yeah ill get a screenie when i go round me mums again