There are two versions in windows vista. they are
1) vista 32 bit version
2) vista 64 bit version
First of all to install a 64 bit version you must have 64 bit processor and also the device drivers are to be 64 bit version compatible.
To check what is platform of vista is installed in ur computer right click My computer on desktop and then click on the properties in the drop down menu.
The advantage of 64 bit version is that it can access RAM that is above 4 GB.
It supports RAM from 1 GB to 128 GB.
64-bit versions of Windows Vista relate to memory accessibility, memory management, and enhanced security features. So the processing is fast.
1) vista 32 bit version
2) vista 64 bit version
First of all to install a 64 bit version you must have 64 bit processor and also the device drivers are to be 64 bit version compatible.
To check what is platform of vista is installed in ur computer right click My computer on desktop and then click on the properties in the drop down menu.
The advantage of 64 bit version is that it can access RAM that is above 4 GB.
It supports RAM from 1 GB to 128 GB.
64-bit versions of Windows Vista relate to memory accessibility, memory management, and enhanced security features. So the processing is fast.
| Architecture | Windows Vista, 32-bit versions | Windows Vista, 64-bit versions |
|---|---|---|
| System requirements | 1-gigahertz (GHz) 32-bit (x86) processor or 64-bit (x64) processor, 512 MB of RAM | 1-GHz 64-bit (x64) processor, 1 GB of RAM (4 GB recommended) |
| Memory access | A 32-bit version of Windows Vista can access up to 4 GB of RAM. | A 64-bit version of Windows Vista can access from 1 GB of RAM to more than 128 GB of RAM. |
| Memory access per edition | All 32-bit versions of Windows Vista can access up to 4 GB of RAM. | Windows Vista Home Basic - 8 GB of RAM Windows Vista Home Premium - 16 GB of RAM Windows Vista Business - 128 GB of RAM or more Windows Vista Enterprise - 128 GB of RAM or more Windows Vista Ultimate - 128 GB of RAM or more |
| DEP | 32-bit versions of Windows Vista use a software-based version of DEP. | 64-bit versions of Windows Vista support hardware-backed DEP. |
| Kernel Patch Protection (PatchGuard) | This feature is not available in 32-bit versions of Windows Vista. | This feature is available in 64-bit versions of Windows Vista. Kernel Patch Protection helps prevent a malicious program from updating the Windows Vista kernel. This feature works by helping to prevent a kernel-mode driver from extending or replacing other kernel services. Also, this feature helps prevent third-party programs from updating (patching) any part of the kernel. |
| Driver signing | Unsigned drivers may be used with 32-bit versions of Windows Vista. | 64-bit versions of Windows Vista require that all device drivers be digitally signed by the developer. |
| 32-bit driver support | 32-bit versions of Windows Vista support 32-bit drivers that are designed for Windows Vista. | 64-bit versions of Windows Vista do not support 32-bit device drivers. |
| 16-bit program support | 32-bit versions of Windows Vista support 16-bit programs, in part. | 64-bit versions of Windows Vista do not support 16-bit programs. |
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