If you have obtained a legitimate ISO file (approximately ): Install Office 2010 - Microsoft Support
For those who cannot access the official portal, third-party digital archives host copies of the original ISO files. Microsoft Office 2010 Professional Plus 64-bit Iso Download
: For those with a disc who need to install the 64-bit version specifically, you can find the folder on the installation root and run from there. Microsoft Support Community & Archived Downloads If you have obtained a legitimate ISO file