How do you know it isn't for, say, a display kiosk? Perhaps the OP's work is a retail store of some kind and it would be beneficial to have a public terminal to access their website.
OP - there is an old program I used to use for kiosk-type setups. You might like it. It's called WinLock Professional. It is not free but I think you can find a trial. There are lots of similar programs out there, some free. It's a LOT harder to try to get the settings perfect if you are trying to do it just using Windows settings...probably not worth the time, so just look into third party programs for it.