Shoutbox

go to star> my computer> (right click) properties> advance tab> and on the start up and recovery part click setting
choose the one the that u dont need be bvery carful you dont want to delete the one that u actually need!

this may be more clear:
   1. First, open a command prompt.  Click start, then run and enter cmd, then click ok.
   2. Rnter the following command to see the boot info "bootcfg /query"
      (this will display your boot settings, what you will need is to take note of which boot entry ID you wish to delete.)
   3. Then type the following "bootcfg /delete /id 2
      (In this case we have chosen to delete the second OS entry which we noted down earlier from the bootcfg query command.)
   4. Then once you restart you won't get the option to pick what OS you want to load.