Microsoft Office 2010 Excel X64 -thethingy- -

If you still maintain legacy systems or virtual machines with Office 2010 X64 (e.g., for old financial models), follow these steps:

Visual Basic for Applications (VBA) in 2010 X64 required a total rewrite of API declarations. The Long pointer became LongLong. If you used a Declare statement without PtrSafe, Excel would instantly hard crash. No error message. Just poof—gone.

Not all operations became faster – some even became slightly slower due to larger pointer sizes (8 bytes vs 4 bytes). But for: MICROSOFT OFFICE 2010 EXCEL X64 -thethingy-

…the 64-bit version was dramatically smoother. No more “Calculating (4 processors)… 45% complete” stalling for hours.

Microsoft Knowledge Base Article 983396 (2010):
“We recommend most users install the 32-bit version of Office 2010, even on 64-bit Windows, because of compatibility issues with ActiveX controls and third-party add-ins. Install the 64-bit version only if you work with extremely large datasets (>2 GB) or require Large Address Awareness.” If you still maintain legacy systems or virtual

Thus, if “-thethingy-” is a constant source of pain — consider switching to Excel 2010 x86 unless you absolutely need >2 GB memory per process.

If you were a power user, financial analyst, or scientific researcher in 2010, you remember the quiet revolution that came with a single checkbox during Office installation: 64-bit edition. To many, it was simply “the thingy” – that mysterious version of Excel that could handle enormous datasets without crashing, but also broke half of your legacy macros. This article unpacks everything about Microsoft Office 2010 Excel X64, from its architecture to its real-world impact, and why it still matters today.