Choosing the 64-bit version of Microsoft Office 2019 is generally better if you work with large datasets or complex files
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Microsoft changed its default recommendation starting with Office 2019, now favoring the for most users. While the 32-bit version remains available for legacy compatibility, the 64-bit architecture is better suited for modern hardware and demanding tasks. Why 64-Bit is Generally Better Choosing the 64-bit version of Microsoft Office 2019