Windows does not know that the portable .exe can open .doc files. Fix: Do not double-click documents. Instead, open WordPortable.exe first, then use File > Open inside the app. Alternatively, use a portable file manager (like Total Commander) to drag-and-drop the file onto the portable EXE.
: By clicking the specific launcher for Word, Excel, or PowerPoint, the application virtualizes the necessary registry entries in real-time, allowing it to function as if it were fully installed. Modern Compatibility: Using Office 2003 in 2026 Windows does not know that the portable
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