No worries, it has happened to me as well. It's not that. The handle is at the proper position for when the window is closed. It's just stuck there and won't move

I was afraid it would be something like that.

Thanks to all

Couple of days ago

Thank you all for the comments.

Unfortunately I'm at work now so I can't provide any pics

The window has not been painted shut.

I can only turn the handle a few degrees, maybe up to 10-15.

It feels... sealed shut.

And the window doesn't budge in the least