I bought two new drives and installed Windows 7 Ultimate, using Windows disk mirror facility (C
. I also had an old drive in the system that had Windows 7 RC on it (D
. Upon boot, Windows Boot Mgr would give a choice of old or new Windows, as well as secondary plex. I tried a Windows System Image, and it wanted to include D:. So, I unplugged D:, but then the system wouldn't boot. I plugged D: back in, booted, changed the name of its Windows directory, and rebooted -everything worked OK, so system is in fact not using Windows directory on D:. There must be some small file on D: that needs to be on C:. How can I get rid of my dependence on D:? Will the method described earlier in the thread work? I don't care about the ability to select old operating system, but I guess I may be stuck with the boot mgr screen due to secondary plex. Main thing I want is for system to all be in C: - what's the point of mirroring if a failure of D: can still take me down?