It is both, you need to upgrade both hardware and software. Just be careful, some programs dont support x64
You can not "upgrade", you will have to reinstall. If your hardware meet 64-bit's requirement you can install 64-bit.
You need the hardware that can support both 64 bit computing as well as the software (most especially the operating system) that can run on a 64 bit platform.
Both, you need to have 64 bit capable hardware as well as software.
The free upgrade to Windows 10 typically refers to the upgrade from Windows 7 or Windows 8.1 to Windows 10, and it can include both 32-bit and 64-bit versions, depending on the version you are upgrading from. If you are running a 32-bit version of Windows 7 or 8.1, you will receive the 32-bit version of Windows 10; similarly, a 64-bit version will upgrade to 64-bit Windows 10. To take advantage of the 64-bit upgrade, your hardware must support it.
64 bit support Hardware is minimum and 64 bit server support hardware is maximum.
32 bit and 64 bit are 2 types of versions of software available. 64 bit software are more secure than 32 bit.
Hardware can affect your OS performance and what kind of OS you get. Depending on your storage and processing ability will determine if you install a 32 or 64 bit. 64 is higher then the 32 performance wise.
Yes; you must use an upgrade disk, and it has to be the same "bit" that your current OS is (e.g. 32-bit upgrades to 32-bit, 64-bit upgrades to 64-bit).
If your computer came with 32-bit windows installed then 64-bit won't work for you. If 32-bit came with it then it means that your processor can only handle 32-bit operating systems. 32-bit os's are usually smaller files that are easier on a lower end processor
The R3000 only has a 32-bit processor; it cannot run 64-bit software.
You can only install 64 bit Windows Vista on a machine with 4GB ram. If you have enough ram then you need to do a clean install. To do this boot up your machine with the 64 bit Vista CD. Then follow the on screen instructions.
Usually, you do not have to upgrade anything else.