did you chose to install a second version of Windows on a data disk parallel to your current 40 Gb OS disk. This is asking for trouble, especially if you go and swap disks afterwards.
This might be difficult to undo. You'll need expert help from people versed in multi-boot systems. But first please tell what you wanted to reach.
Kees
hello,
i have a 40gb hard drive running windows xp and a 250gb hard drive full of work and music etc.
i took the 250gb out when i formatted the 40gb one. after i installed windows with service pack back on the 40gb it all worked fine.
then i took the 250gb out to format a 200gb i have and put windows on that one as well.
this all worked fine then when i took the 200gb with windows installed out and put the 250gb back in windows will not read it(250gb)
there is also a message every time i start the pc asking which version of windows i want to run. there are two choices given, both being windows xp. the first one doesnt work, saying there is a file missing even though the 200gb hardrive is in and when i first installed windows on it, it worked fine.
When i try to just use the 200gb hard drive windows will not load, sending me the message ' INSERT FORMAT DISK '
if anyone can help me with this problem i would be very grateful,
thank you

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic