If you are on a modern operating system and Office 2010 is complaining about missing MSXML, the issue is usually that the Windows System Files are corrupted, or the Office installation itself is broken.
recently, you might have hit a frustrating brick wall: an error message stating that the installation requires MSXML version 6.10.1129.0 This specific component—technically part of Microsoft XML Core Services 6.0 Service Pack 1 download best msxml ver 61011 290 for office 2010
Repair Office 2010 installation (Control Panel → Programs → Office 2010 → Change → Repair). This re-registers the correct MSXML version with Office components. If you are on a modern operating system
To resolve the error "The installation of Microsoft Office 2010 requires that MSXML version 6.10.1129.0 should be installed," you need to install the Microsoft Core XML Services (MSXML) 6.0 Service Pack 1 . This specific version (6.10.1129.0) is included with MSXML 6.0 SP1 Microsoft Knowledge Base Archive Official Download To resolve the error "The installation of Microsoft
Without the correct MSXML version, Office 2010 will either refuse to open certain XML files, crash when saving macros, or display error 0x800401f3 (Invalid class string).
Since Microsoft has retired some direct legacy download pages, you can find the necessary components through the Microsoft Update Catalog or official security update mirrors.