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Had a bad memory module and it damaged the boot record. Any way to repair without reformating It is NTFS file system.
There must be a way 
Ken >>
If you have single NTFS partition and you damaged ONLY MBR - you'll recover it.
1. Try to boot from win2k boot cd and use repair console. There is an option of restoring MBR.
2. There are a bunch of utilities that will do that (type recover mbr NTFS on google.com). Although none of them are free :-( What I ended up (I have several OS's on my hardrive and strange partitions) is using free utility for Linux that restored them all.