Also in addition to ^
You do not need to reinstall vista to install Window 7, even if your windows 7 is an upgrade version.
In fact I recommend not reinistalling Vista and then installing win 7.
Method for using upgrade win7 and doing a "Fresh Install" with out previous operating system installed.
Select CUSTOM install. Complete install. DO NOT enter windows 7 Key when prompted for it.
When install is competed:
- Allow win 7 to download all updates. (Note you will have upto 30 days to activate - imput Key when you activate.
- When all updates have been perform the next two steps:
Ref: In the link sroll down to "Method #2.http://www.winsupersite.com/article/windows-7/clean-install-windows-7-with-upgrade-media.aspx
Condensed version of link:
(1) from start menu - type regedit.
Simple way to find location to change - under edit Do a search for "MediaBootInstall" with out quotes. On right side double click it and change the "0" to a "1" then exit/close - There is no save, it does it automaticlly.
(2) From start menu - type cmd
In the dos window enter slmgr /rearm and hit enter.
Wallo, you can now activate using your key.