I have an imac pc with windows xp as a multiboot option
I install vista as another boot option, after then xp refuse to boot.
it says [WINDOW ROOT]/HAL.DLL files are missen. the vista became corrupted and i had to delete all window partitions with an xp bootable. still after copying system files, HAL.DLL still missen but the system still takes VISTA installation. I finally was able to install xp after vista installation but all other partITions including the mac partion was deleted.
now only xp runs on the imac apple system. any foreseable problem , how about the issue of the HAL.DLL FILE [/url]
Like already said make sure ur installing each os on different partions with the appropiate file system. example vista only runs on NTFS and xp can run on both NTFS and NAT file system ( NAT being slower).
You can also try installing this llitle program call EasyBCD.