How to delete windows os launch option at start of pc..
there are two ways to delete this options.
(1) from running pc
(2)from command prompt
command prompt use can be dangerous for use.
because it need high knowledge of computer language...
so we first try by running pc .
FIRST STEP--
CLICK ON START MENU AND OPEN RUN PROGRAM
OR PRESS WINDOWS BUTTON + R..
AND TYPE "msconfig" without " " .
as given in below image.
STEP 2--Now system configuration menu is opened
choose boot sector in this menu.
choose your os option which you want to delete in boot menu and click delete and OK button.
as given in below image.



