This also may be due to Norton AV:Microsoft supportThe Norton AntiVirus plug-in for Microsoft Office scans documents for macro virus infections in Office products. This plug-in may cause performance issues, the inability to open files within Office, or the inability to install some Office programs. This article contains the latest information about how to use Office with the Norton AntiVirus Office Plug-in.
Manually install updates; downloads for the updates are here, that way you don't have to go through the 'Scan for updates' and get the errors:
I will email you with some info, If you don't get it in you happycards account by the time you read this, it may have bounced again. I have a great tool that may be able to uninstall this and it also handles registry cleaning and more.