I have an Intel box on which I previously was running both Linux and Windows. The boot loader that is installed is GRUB. I deleted the Linux partition (accidentally), and now when I reboot the machine Windows does not boot like it used to (Windows was the default OS). Instead, the system comes up with a "grub > " prompt.

How do I boot windows directly from grub? Please help!

You won't be able to boot with Grub, because stage 2 of GRUB was on your Linux partition, which is now wiped.

The best bet is going to be to repair the master boot record (MBR) using your Windows tools. For example:
http://www.microsoft.com/resources/d...d_tro_ldau.asp

Hint: Read very carefully about the risks of playing with the MBR. If you damage your partition table you may not be able to recover Windows. In the future you should always have a bootable rescue floppy disk (or CD).

Hint: If you haven't backed up your critical Windows data, do that first. You can do this without booting Windows for example by booting from a live CD (Knoppix for example) and copying the essential data to whatever media you have available.

The following page is for SUSE Linux, but applies to other distributions as well and offers several methods to restore the Windows MBR:
http://portal.suse.com/sdb/en/2002/0...tall_grub.html

Thanks guys! "fdisk /mbr" did the trick!