Last night I crossed my fingers and upgraded my Vista Professional workstation to Windows 7 Ultimate. I have multiple backups, including Mozy, Windows Backup every night, and a Windows Complete PC Backup (essentially a disk image) every week. As a result, I was very confident that even if all hell broke loose I could restore things quickly. Happily, the upgrade went smoothly and Windows 7 is running great. All of my programs and settings were migrated perfectly.
The upgrade compatibility analysis at the beginning highlighted two potential problems that I dealt with. First, I run two ATI Radeon 4850 video cards to power my three monitors for work, but I enable CrossfireX when gaming, which disables the two outer monitors and puts all the GPU power into the center screen. Windows 7 warned me that my ATI drivers might be a problem after the upgrade. So I simply uninstalled the existing ATI drivers, ran the upgrade, and the installed the Windows 7 64-bit ATI Catalyst drivers after the upgrade. Everything works fine.
The other item flagged was iTunes. I did some research, and it turns out that Apple appears to be using an older and/or unsigned GEAR driver in iTunes. This has to do with CD/DVD recording/burning. I'm not sure why they would do this, but there is an updated driver available at the GEAR Software site. I installed that update and then proceeded with the Windows upgrade, and everything works fine after the update finishes. So if you're getting this warning and want to be sure it won't mess anything up afterwards, I'd install the updated driver.
Overall, Windows 7 is very nice. It looks better than Vista and has many new features like the taskbar, improved Explorer interface, better window management, etc. I'd been using Vista for about 10 months and unlike most people I never had any real issues with it, it worked just fine with no crashes or problems. Even so, the new Windows is definitely an improvement as things seem snappier, and the enhancements are welcome. So as long as your backups are up-to-date and you look over any upgrade warnings carefully, I'd definitely recommend installing it. Hopefully this entry might help others who see these types of warnings, especially the iTunes one.
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