Hey KratterFoot,
Try clicking on the ‘Window’ menu to see if there are any windows like ‘Details’ which are not actually being shown.
You can also try resetting your viewport back to the default layout by clicking on the ‘Window’ menu and selecting the ‘Reset Layout’ option. I have had this happen to me once or twice, and this usually resolves the issue.
I hope this helps, but if you still need assistance please let me know.
Cheers,