This post was published 6 years 2 months 19 days ago. So some of the links may be broken and the content may not be applicable any more.Faced with an exception from a COM+ component, I was “googling” around, when I got these steps on how to re-install COM+ (as a last try maybe 
Who knows, when this info. might come in handy!)
1. Rename registry key HKLM\Software\Microsoft\COM3
2. Control Panel: Add remove Programs | Add remove windows components
3. Click Next (without doing anything else)
4. Reboot
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