Help how do I uninstall win vista business 32-bit then install win 7 ultimate 64 Tags: Windows 7 Windows Vista Last response: September 14, 2010 2:31 PM in Windows 7 Share Anonymous a b $ Windows 7 September 14, 2010 3:18:08 AM Hello, I want to install windows 7 ultimate 64-bit over windows vista business 32-bit More about : uninstall win vista business bit install win ultimate Herr_Koos a b $ Windows 7 September 14, 2010 7:20:47 AM If you have made backups of all critical data, the easiest would be to just start the Windows 7 installation and let it format the drive. m 0 l 1haplo September 14, 2010 2:31:48 PM You can not upgrade a 32 bit OS to a 64 bit. You must do a clean install. Back up your files that you need to keep and boot to the Windows 7 X64 bit DVD and install. m 0 l Can't find your answer ? Ask ! Publish Related resources SolvedVista 32-bit install OEM Win7 64-Bit Forum Solvedhow to install Win 7 ultimate 64bit in UEFI Forum How to install office 2007 ultimate Win32 on Windows 7 32-bit Forum SolvedNeed help installing win7 64 bit in win7 32bit and replacing it. Forum SolvedHow to install win 7 64bit over Activated win 7 32bit Forum how do I re install my win 7 64bit which was changed to a 32bit os Forum How to install Win 7 Ultimate 64bit? Forum Installed Win7 Ultimate 32 over 64Bit Vista- I need 64bit Win7 Forum Solved6GB, dual boot Win XP Pro (32-bit) and Win 7 Ultimate (64-bit) Forum SolvedI am using win7 32bit i want to install win8.1 64bit to my pc when i run the setup it shows some error saying that my pc versi Forum SolvedShould i install 32bit or 64bit win 7? Forum Solvedhow to upgrade ssd win7 32bit to win 7 64bit Forum SolvedHow to boot fast in win 7 Ultimate 64 bit? Forum SolvedInstalling Toshiba 3TB HDD on Win7 Ultimate 64 bit Dell 8300 Forum Windows Vista Home premium 32bit to Win 7 Pro 64bit Upgrade Forum Sharing a Printer: new 64-bit Win 7 pc and an old 32-bit Vista pc Forum Going from Vista Home Premium 32bit to Win 7 64 Bit Forum GIGABYTE GA-X48-DS4 X48 RT and Win Vista Ultimate 64 bit Install Forum Upgrading Vista 32-bit to Win7 64-bit with Raid 0 Forum SolvedHow can I format my vista hard drive so I can do clean install of win7 Forum More resources Read discussions in other Windows 7 categories Configuration Customization Drivers Security Laptops !