OK, now you have me confused. Your first post said you were trying to re-install Office when you got the error message. You second post mentions a laptop on which Office can't be found after trying to re-install, plus a desktop to which you wanted to transfer the licence.

If you want to transfer the laptop licence to the desktop, you should uninstall from the laptop, then install on the desktop. If you want to install Office on both your laptop and desktop, you need to check that your licence allows that.

FWIW, the error message in your first post is indicative of corruption in the Windows Registry. Using System Restore to revert your system to an earlier date is about the only way out of that unless you want to reinstall not just Office, but Windows and every other application you use, from scratch.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]