Setting the correct device boot sequence may be required in BIOS.
Boot the computer using the 64-bit (圆4) Windows 7 installation DVD disc media or a Windows 7 install USB key flash drive. Alternatively, just manually do a backup and copying of all data files and personal documents, photos, images, videos, bookmarks and etc. Note that installed programs won’t be migrated or ported over to the new Windows installation. Backup and save existing application settings and data to migrate to the new system with Windows Easy Transfer. Here's the brief guide for those who wish to upgrade to a 64-bit platform from a 32-bit Windows: The only way to install 圆4-based Windows 7 on an existing 32-bit Windows installation (or vice versa to downgrade from 64-bit to 32-bit OS), is to do a clean install, which is indicated by “Custom (advanced)” installation during set up Windows 7 installation wizard. So how do you upgrade from 32-bit Windows 7 to 64-bit Windows 7? Unfortunately, there is no direct way to perform an in-place upgrade from a 32-bit operating system to 圆4 Windows 7 with existing application programs and data retained. Check your computer’s system information to see whether you need an x86 (32-bit) or 圆4 (64-bit) version of the program, and then contact the software publisher. The version of this file is not compatible with the version of Windows you’re running. If you attempt to run the setup.exe stored in the root and “sources” folder of the DVD disc media or ISO image, the following error will occur: When you try to run the 64bit setup.exe Windows 7 installer from within a 32bit operating system, the following error message will occur: 
How to upgrade from 32Bit (x86) to 64Bit (圆4) Windows 7Ī direct upgrade from 32-bit (x86-based) Windows 7 to 64-bit (圆4-based) Windows 7 OS is not a supported upgrade path. Help options - 4 groups of items - 12 total selections PC Parts options - 11 groups of items - 50 total selectionsĮlectronics options - 12 groups of items - 60 total selectionsĪccessories options - 10 groups of items - 50 total selections
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