address bar lock of IE default window xp

Hello guys

I need a help , In my office address bar of my internet explorer is locked.

I try to put and any website name.

It shows me a message. you don't have the right to access.

and at last there is option of username and password.

username is R

but I don't know the password. So how can I access the internet.


Please tell some way that My boss don't get any info about this and I can easily access the database.


Thanks in advance