I just thought I would try out the Windows 7, so I installed the 64 bit Enterprise trial on a clean HD. The trouble is that it loses my second drive's Primary partition. All the other logical drives are there but not the Primary partition. I have never had any problems with XP or Vista like this. This sounds like a bad partition handler to me. I hope this is not how bad it is staying because for those upgrading from XP have a lot to lose if this is the only way W7 handles partitions and makes up a whole new meaning out of "I'm a PC and Windows 7 was my idea!"