Getting exactly the same issues here.
it seems some what random in that I suddenly got the AWSOME message and everything GREEN, However I noticed my AVG flaging a warning that part of it was off so I switched it back on and guess what MWB3 gave out error message of web not protected.
I thought all other protection software was compatible or so the advertising blurb says.
Probably going to revert to Vers. 2, if I can?
Don't see any point in listing PC spec as the fault is as described by several others above.
Regards