Error 80040154 using ghexcel plugin

Hello everyone,

I have a problem i can't seem to be able to fix on my own.

While using the ghexcel plugin in grasshopper, which allows to put an excel file in the software, an error appears N°80040154 telling me this :

"Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80040154."

When looking on google for help i found out that the error 80040154 wasn't only realted to grasshopper but to many other softwares and to the NET framework (i'm using the latest version of it 4.6.2 - installed yesterday, thinking that it might solve the problem but it doesn't)  i'm using windows 7 and rhino 5

the gh file works on my friends pc so it clearly doesn't come from the file, either the gh or the excel one. 

Any help will be much welcome! 

And talk to me as if i didn't know anything about computers, because i don't know much.

THANKS A LOT!