1st HDD is loaded with Windows 2000 Professional and I have installed Red Hat ES 3.0 on second HDD(80GB). After linux installation failed to load windows and boot stucks with displaying only L How to fix this issue
For a problem like this I think google is going to be your best friend.
I'm guessing, by the sounds of it, that you've installed GRUB boot load on the MBR (Master Boot Record) in which case the technical term is you're stuffed, although I do believe you can boot up using your windows boot disk and go into the console mode or recovery mode... whatever it's called and try and do a fdisk on the mbr...