Installing windows vista ultimate 64 bit on windows 7 64 bit laptop?

Going from 32 bit to 64 bit requires a clean install. Quote from the Microsoft Windows 7 FAQ: You can use the Upgrade option during Windows 7 installation, which preserves your files, settings, and programs, only if you're currently running a 32-bit version of Windows Vista and you want to upgrade to the 32-bit version of Windows 7. Similarly, if you are running a 64-bit version of Windows Vista, you can only perform an upgrade to a 64-bit version of Windows 7.

For more information, go to Upgrading to Windows 7: frequently asked questions on the Windows website. If you want to move from a 32-bit version of Windows to a 64-bit version of Windows 7 or vice versa, you'll need to back up your files and choose the Custom option during Windows 7 installation. Then, you'll need to restore your files and reinstall your programs.

For more information about performing a custom installation, see Installing and reinstalling Windows 7?.

It can't be upgraded, has to be a new installation. It won't delete current data, just move it to Windows.old. I won't preserve program settings.

Microsoft has something called "Easy transfer", I haven't used it. I'd also make sure to check if programs and plug-ins have an "export settings", like browser favorites. You can also compress (and split in multiple files) all your important data, and store it elsewhere.

There are free services (I don't know if available in India) like Microsoft Skydrive (25GB), also most e-mail services lets you attach data in unsent e-mails.

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