You possibly want to activate your view cube which is on the top right hand side of the drawing field. To activate it please go to the ”View” tab and click on the second icon from the left called ”View Cube”. It’s under the ”Viewport Tools”. Once you click on it, it should activate the View Cube, then you’ll be able to rotate your drawing in 2D View in any direction.
Then it looks like global software issue and in this case you can make complete reset of your software. This reset should fix problems with the software, however, you will loose all your custom settings.
If you don’t want to loose it, you can backup them prior to reset. Or if you happy to loose, you can apply them again after reset.
Here are the steps:
Close AutoCAD software, then click on Windows “Start” button. Scroll to the “AutoCAD folder, click there, scroll down where “Reset Settings to Default” is and click here. Then click on either option: “Backup and Reset Custom Settings” or “Reset Custom Settings”. Then in a few minutes your AutoCAD installation will be refreshed and look like brand new. Should fix all global software errors too.
As Sergiy pointed out the options are several and if that failed to fix your issues then there is certainly one thing that might be causing eh problem and it’s your software type. I guess you re using AutoCAD LT and not the full version of AutoCAD and in LT there is no viewcube.