These fixes are great but what are the causes of these issues?

My system is set up with 2 harddrives in raid 0. It seems as if everytime windows vista ultimate does a needed update and reboots, it loses NTLDR and cannot boot.

Does anyone know what the issue would be in order to prevent this from happening and taking an additional 15-30 minutes just to get the operating system functional again?

It's quite irritating to me and makes me want to buy a mac >.<


-Frank