Downloaded from where? The trial from Autodesk?
No, the full version. I downloaded it from their site. It's not pirated in case that's what your thinking.
I have a student account with them, but the problem is I can't even get to the activation screen.
I had it up and running in the past, and I'm re installing it now after I went back from windows 8.1 to 7. I'm hoping I won't have to to a clean install.
It's not just Inventor, I have the exact same problem with Skype.
Do you yet have Internet Explorer? I went through the same issue when I prematurely(after windows install) got rid of my IE after I installed Chrome. The issue was later avoided by removing IE from the taskbar and not downloading updates via Windows Updates while I left IE installed but was left unused.
Go back into control panel>uninstall a programme>turn windows features on or off and recheck the IE box. You can choose to have Chrome as the default browser but will not cause the two windows to come up like you do.
You should also get rid of all those desktop icons - it will help with your boot up times to desktop view and help with reducing system resource usage.
A fresh install of windows would do you wonders as about this point you're beating about the bush and you have no reason why you're doing so. Yes, this sort of outcome generally comes from a corruption within windows and since you can't really say when this took place...we have to assume that anything and everything you do is more down time on your work.
Take a deep breath and backup data and take another deep breath to install windows