
Well . . . let's start with a quick repair on grammar so your problem can be deciphered. ;)
If I understand correctly, you installed a freeware 777, when using it your view is locked into spot view, and then following being locked into spot view, your screen turns black and the graphics for the game do not return.
If my translation of your comment is not correct, please, let me know. But, assuming I made a correct translation, there are some questions that can help track down your problem:
1) Are you having the same problems with all your aircraft now, or just the freeware aircraft you installed?
2) Does the freeware 777 automatically start in spot view, or do you switch it to spot view and then have problems?
3) Which file exactly did you download? Do you have the link available? Do you follow the installation procedures in the README file for that particular add-on?
4) What do you have to do to get FSX working again? Complete system shutdown? Just restart FSX? Or simply end the flight?
If you provide more details on your specific problem, take a deep breath, and write in complete sentences, I am willing to bet that one of the wise folk (more wise than I, by far) around here will have some helpful advice.
But, should no solution be forthcoming, there is always the dreaded re-install
if all else fails. Before that, you may simply want to have a go a removing (and reinstalling once more if you want to give it another try) the problematic add-on.
Good luck!
~Darrin