@Patrick1323
A little late to the party... 
Please try the following:
1. Exit Inventor
2. Select the Windows start button and type in the search box the word CMD but do not hit an enter.. If you using WIn 10 just type in Cortana's enter box.
3. When command prompt appears in the list, right mouse click on it and select run as admin.
4. Navigate to C:\Program Files\Autodesk\Inventor <version>\Bin folder.
5. Type Inventor.exe /install
6. Wait a few minutes and restart Inventor
Did that help?
Mark Lancaster
& Autodesk Services MarketPlace Provider
Autodesk Inventor Certified Professional & not an Autodesk Employee
Likes is much appreciated if the information I have shared is helpful to you and/or others
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