
Even though it proved to be one of the worst versions in terms of RAM consumption, memory management, hardware requirements, etc… Windows Vista was the first real incentive for hardware manufacturers to start writing 64-bit versions for their drivers and it happened on a large scale.
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This version came in both 32 and 64-bit versions simultaneously. Things started to improve once Windows Vista was released. Yet, a limited number of companies have adopted the new standard by that time. Manufacturers had to adopt the new standard and rewrite the drivers to make them available for both OS versions. Requiring 64-bit driver support, the kernel of Windows XP was completely incompatible with 32-bit versions of drivers already written for previous versions of Windows built on the 32-bit architecture. Unfortunately, the attempt encountered implementation issues because of spotty driver support that widely limited its adoption on a large scale. The very first versions of 64-bit windows operating systems are dating back in 2005 when Microsoft Corporation released Windows XP Professional 64-bit.
