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. 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. Can't find your answer ? Ask ! Publish Related resources Upgrade from 32-bit Vista Ultimate to 64 -bit Windows 7 Forum Vista 32-bit install OEM Win7 64 -Bit Forum How to install office 2007 ultimate Win 32 on Windows 7 32-bit Forum XP Pro sp3 vs Win 7 Ultimate Forum Vista 32-bit to Windows 7 64 -bit Forum Going 32bits from 64 bits in win 7 Forum Windows XP Pro 32bit to Win 7 Pro 64 bit Upgrade Forum Win 7 64 -bit on Vista 32-bit ? Forum Win 7 Ultimate 64 bit only recognizes 4GB of 8GB of installed RAM? Forum Win 7 - 64 or Vista - 64 Forum GIGABYTE GA-X48-DS4 X48 RT and Win Vista Ultimate 64 bit Install Forum [Solved] 32bit Program No longer Working On 64 bit Win7 Forum How to transfer files from win7 64 bit to win7 32bit Forum Need clarification and advice about upgrade XP 32-bit to Win 7 64 -bit Forum How to downgrading to Win 7 32bit from 64 bit Forum Gaming on Vista Ultimate 64 Bit Forum Why did Bill Gates invent Windows? Forum My eSata externals no longer work because of Win 7 ult 64, help! Forum Windows 7 vs Vista Forum Audio crackling/pops DRIVING ME CRAZY. Please help. Forum More resources Read discussions in other Windows 7 categories Configuration Customization Drivers Security Laptops !