I have just started with Linux and I have installed Slackware 10. Everything seemed to go ok but when I reboot it doesn't seem to find Linux. I don't get ant errors just a beep and the letters LI and everything freezes. I can get it up from a floppy if I mount root=/dev/hda1.
Any idea what has gone wrong ?

ive got the same problem. i cant load up slackware unless i have the boot floppy in the drive. anyone!??!

I have had the same problem.

It seems that (sometimes) once XP has written something on the MBR lilo was no longer able to overwrite it. In no way.
Don't ask me why!!

I resolved it with a w95 boot floppy with diskedit. I've wrote manually a lot of 0 in the first 16MB of my HD. (maybe i've exaggerated, but that's worked)

Do not do this if you don't understand the consequences.

This will cause the loss of all the data (may be needed part of the OS) stored in that part of the disk. In my case I do that cause I usually use that 64MB to store the kernel so I backupped them first and restored them after.
That will also cause the loss of the partition table, with the apparently loss of the data stored in the disk, but that can be restored in some way..

If you have windows installed on the first partition (as it usually is) your winzozz will not boot after this operation, and you will have to reinstall it.