How would one reinstall Windows 7 on the computer if his current hard drive were to die without the old copy of Vista? That's why I see it as being necessary to image the drive, otherwise you'd have no way of putting Windows 7 on the new drive (or keep the old Vista disc, install that, then upgrade to Windows 7 -- huge PITA)
"Upgrade" copies, also have a full, or "Custom" install option, not needing the Vista disk.
Apparently it's hit or miss, but most seem to get away with it.
Follow http://www.mydigitallife.info/2009/10/27/clean-install-windows-7-with-upgrade-media-and-product-key-on-formatted-or-empty-blank-hard-drive/ and all should be good, and if not, they have work around to make it work.
Note: It doesn't specifically say, but use the
Custom option when prompted.
How to Clean Install Windows 7 with a Upgrade DVD Disc or ISO Image
Note: User who has downloaded Windows 7 boxed ESD installation files should follow these steps to create a bootable Windows 7 ISO image from unpacked Windows 7 installation files and burn to DVD prior to follow guide below.
1. Boot up the PC with the Windows 7 Upgrade DVD disc media into DVD-ROM drive.
Note: May need to change boot sequence or boot order of device in BIOS, and/or press any key to boot from CD/DVD drive.
2. Follow the Windows 7 Install Wizard to install the operating system on the blank, empty and clean system. (Again, using 'Custom')
3. During installation, when prompted for a product key, DO NOT enter the upgrade version product key.
Tip: This step is to prevent “Invalid Product Key” error. User can try to input the serial number to check if setup accepts the key. If it’s accepted, all the rest of steps can be skipped.
4. Unselect and untick the Automatically activate Windows when I’m online check box during the installation process.
5. After Windows 7 is installed, boot up to desktop, and manually enter the Windows 7 upgrade product key to activate online or activate via phone.
Steps above, which is practically how to perform clean install with a Windows 7 full version media and product key, should work for some, if not most, users. On system that the system still does not accept an upgrade version product key, or face activation failure error code of 0xC004F061, try one or more of the following workarounds to get Windows 7 activated:
I used a Vista Upgrade disk (Trial purposes only.) back when it was new and I used the 'Custom' option to a new partition without issue. I left XP installed at the time and everything worked. W7 is supposed to be even better for this.
I'm very confident the OP will not have any issues, though there is always a slight possibility!