If so, boot from it, when it has finished loading press R to launch the recovery console. Type the administrator password (just press enter if you don't have one), then you will be at a command prompt. type fix /mbr (or fix mbr or /fix mbr, can't remember!) it will ask you to confirm. This will write over the Linux bootloader with the default Windows one, deleting it. Then type exit/restart/reboot (again, I can't remember!) to restart.