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.
Notes
A precision 490 will support Windows x64, but you have to do a clean install to upgrade from 32 bit to 64 bit OS.
There is no conversion, just a clean 64 bit OS install
SOURCE: IE 32-bit browser need to run on my 64-bit browser
The Internet Explorer shortcut in the Quick Launch toolbar and in the Start menu of Vista x64 will run the 32-bit version of Internet Explorer by default. Why run the 32-bit version if IE on the 64-bit version of Vista?
There are actually two shortcuts for Internet Explorer in the "All Programs" menu. Why two and what's the difference?
Here's the title of each and the exe's they run:
Internet Explorer
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
Internet Explorer (64-bit)
"C:\Program Files\Internet Explorer\iexplore.exe"
The first one runs IE from the "Program Files (x86)" folder, this is the 32-bit version. The second one is the 64-bit version.
Reference:
http://pietschsoft.com/post/2006/12/03/Vista-Experience-Update-Windows-Vista-x64-runs-32-bit-Internet-Explorer-by-Default.aspx
SOURCE: 32 bit IE won't connect to internet in Vista 64 bit.
32 bit programs, last I checked, won't work in a 64 bit operating system, just as 64 bit won't work in 32 bit operating systems.
If 32 bit programs will work in a 64 bit OS, they probably won't work properly.
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