I am attempting to install Windows Vista beta 1 on a machine that already has WinXP Pro installed with no luck. Here's my setup and what I've tried: Two SATA drives, SATA1 is 72Gig WD Raptor, SATA2 is 300Gig Maxtor SATA1 is setup as three partitions - 1st 7meg Dell diagnostics, 2nd 68gig NTFS WinXP, 3rd Dell recovery SATA2 is setup 1st partition unallocated (for Windows Vista install) and 2nd partition NTFS. WinXP is installed on SATA1 I've tried every combination I can think of with no luck. OSS will not see Windows Vista as an OS option. I even uninstalled OSS, disabled SATA1 in the BIOS, installed Vista Beta on Partition 1 of SATA2, re-enabled SATA1, installed OSS. OSS only sees the Dell diagnostic and WinXP as bootable OS's.