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Murray BrownFlag for United Kingdom of Great Britain and Northern Ireland asked on

VB.net Excel Add-in not installing Certificate not trusted

Hi

I installed an Excel Add-in that I built in VB.net several times on the same machine. The installation suddenly didn't work.
It just froze. So I uninstalled a few Windows Updates and then it installed just fine.

I then tried to install a later version today and it wouldn't. The error message said that the certificate is not trusted.
How could this be? This is very frustrating. How do I get around this?

I tried running as administrator to no avail. Is Windows Updates part of the problem?
Visual Basic.NETMicrosoft Excel

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Murray Brown

8/22/2022 - Mon
SOLUTION
Excel amusant

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ASKER
Murray Brown

Hi
Thanks. This same addin has installed well on over 50 other computers. Why do I need  a root certificate authority?
ASKER CERTIFIED SOLUTION
Excel amusant

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ASKER
Murray Brown

Thanks very much
Your help has saved me hundreds of hours of internet surfing.
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