Hi mattyoaks,
I'd try the control panel and 'clock, region and language' using the above guide or use the help and support that comes with vista.
quote'
Im planning on going to the shop where i bought the pc and asking for the windows CD... shud any CD have the Eng option or do i have to buy a specific Eng version of Vista... quote'
When you first install the os your asked which language you want to use but to be safe, make sure it's a default english language disk but I'm sure it doesn't really matter