If the repair for Office 2007 does not help, then try to uninstall and re-install Office 2007 again.
Follow the articles below to uninstall Office 2007:
For 32 bit Operating system: Follow this link: http://support.microsoft.com/kb/971179
For 64 bit Operating system: Follow this link: http://support.microsoft.com/kb/928218
Install Windows Installer 4.5 for Vista. Check the article below to download and install Windows Installer 4.5:
Check the articles below for error 1635
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