best way to restore MBR? (mult-boot PC)

[Nomen Nescio]

I have multiboot system with XP and 2000 on first hard drive.
Second hard drive has Fedora linux. This was working fine
with a few versions of Fedora: it boots and I choose Fedora
or "other" which then goes to NTLDR to choose which Windows.
Now after upgrading Fedora, when I select other, I get
+||C
on the top left corner of screen and it does not boot.
I booted the XP CD and selected recovery console. I tried
the FIXBOOT command - that did not solve problem.
If I try FIXMBR I get the warning message that I might
stuff up the disk, so I did not proceed.
I can boot from a floppy which has boot.ini pointing to
the XP installation on C: then I can see that my 3
Windows partions are okay, it is just no boot.

 

[philo]

I have multiboot system with XP and 2000 on first hard drive.
Second hard drive has Fedora linux. This was working fine
with a few versions of Fedora: it boots and I choose Fedora
or "other" which then goes to NTLDR to choose which Windows.
Now after upgrading Fedora, when I select other, I get
+||C
on the top left corner of screen and it does not boot.
I booted the XP CD and selected recovery console. I tried
the FIXBOOT command - that did not solve problem.
If I try FIXMBR I get the warning message that I might
stuff up the disk, so I did not proceed.
I can boot from a floppy which has boot.ini pointing to
the XP installation on C: then I can see that my 3
Windows partions are okay, it is just no boot.

just go back and run fixmbr