How to make Windows default boot
 

Okay, a very silly question here, how can I make Windows load by default when I currently have it on Linux? I'm using Fedora Core 3.

If you use GRUB, modify the line containing 'default' to a value that corresponds to the Windows entry (if, let's say, Windows is the 2nd option when you boot, write 'default 1', if it's the 3rd, it should be 'default 2'). Also, you can adjust the value after 'timeout', which represents the amount of time, in seconds, until the default choice is booted.

Okay, I do use grub, where do I find this line that says default?

Oh, sorry, it slipped me. You will find these options in a file called menu.lst, found in /boot/grub. You must edit it as root, I usually do it using sudo:. Or, use 'su' to switch temporarily to root account, edit the file then type 'exit' then Enter to return to normal account.
Anyway, a backup of the file is welcome.

As noted, the configuration file is in /boot/grub and the file is just an ordinary one. You should make a backup copy of it (in the same directory) before making any changes. Unlike LILO, you do not have to re-run anything after making changes.

Incidentally, grub has many powerful options and superb documentation. Take the time to read it.