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The difference between 32bit windows and 64bit windows is the resolution of the image and the higher the bit the better the image.
Ultimate is a larger edition than Professional. If you want to downgrade you will need to buy Professional and do a clean install.
No
bata was windows xp 64bit
Yes, you can.
Just to be safe I would not do it only because a 32bit and a 64bit run on entirely different functions.
Only with 32bit not 64bit
You don't
No, not unless all of the following .Confirm that the computer's processor and motherboard are both 64bit. All 64bit Windows Operating systems will only work on computers that have both 64bit processor and 64bit motherboard architectures.Confirm the computer has no less then the other minimum hardware requirements (Processor Speed, Ram memory, Hard Drive memory, etc.) for the Windows 7 64bit version you want to install.Windows XP 32bit must be removed/deleted before doing a clean install of Windows 7 64bit on the hard drive.
Yes we can provided it is a trial Version.
Yes, 64bit version as well
Ultimate Editions