It is possible to analyze your AutoCAD data if you modeled it as a solid in AutoCAD. The easiest/fastest way I know is to export the data as .STEP or .SAT or some other neutral file format that Inventor can read. AutoCAD solids are not directly imported into Inventor as solids but as surfaces so you would need to go through all of your parts and stitch everything together which could take a long time.
Hope that helps!
Installing service packs will change a few of the settings back to a default state and is designed to do this. One of those settings is the associative box for drawing views. The associativity box will remember the last setting unless you repair with an installation or install a service pack. My guess is that you had this unchecked before installing the service pack.
Uncheck the associativity box and see if you are able to turn the visibility on/off now for components in the browser and directly in the drawing views.