In place upgrade is not possible, but custom upgrade (clean install) is possible from 32-bit to 64-bit Windows OS.

Cheers,

RJC

Right, I call this the installing "on-top" or atop your old Windows, this renames your Windows folder to "windows.old", preserves data files but nothing else from the original installation.

For VMware machines there's one problematic case: machines built with VMware BusLogic scsi virtual disks have no x64 driver available, this makes a clean install of this kind of virtual disk difficult. To test for this case, you could power down your XP machines, change the guest OS setting (VM > Settings) from XP to Win7 x64, power on the VM and if you get this message : "The buslogic SCSI adapter is not supported for 64-bit guests in this release.", then attempting a clean install will lead to a case where the Win7 installer will not "see" the disk. Change the guest OS setting back to XP to boot without the message.

I'm having the same problem on my 24"iMac. I tried it with an "upgrade" disk of Win 7 Pro that has a .exe setup file on the disk. Then I made an ISO from my Win 7 disk. All to no avail. I installed Fusion Version 3 before I tried to add Win 7. I have 3 virtual machines installed already so Win 7 will be number 4. I must say I'm glad to read that I'm not the only one having this problem. If I go to the VM Library, there is no "New" button as I've read various places that there should be. I've tried using the new button in the file menu but it all happens just like ggore describes. The disk shows on the desktop sometimes and disappears at other times. I also see the command line window that looks like it is searching for a network boot of some kind and looking for a DHCP server, or something. Quite the frustrating mess. If anyone has the solution please post it. Thanks to all.

I have ordered the full version of Win 7 professional - rather than the upgrade. I hope that will work on my iMAC 24" when I get it alter this week. I'm presupposing that a clean install will replace the XP Pro I currently have installed on VM Fusion 3 - at least I hope so.

Bob

I had the same SCSI issue and was able to get the file set up as indicated, began the install but then it seems to have stalled at 'Completing Installation' - it has been running for over an hour and has not completed. I tried to stop it by selecting the 'X' in the upper right hand corner, but was advised that it might leave the system totally .... up. Any suggestions or ideas?

Bob

Sorry for the inconvenience. We just tracked this down to a bug in our code that was triggered by the specific version of 10.6.1 on the new iMacs, which is why we didn't catch it before. Updating to 10.6.2 will work around the issue, we've also fixed the bug internally.