OK, I solved the problem, managed to delete the file.
First, I tried everything you guys told me, and it took me a little while because of how slow my PC was running, even my cursor started freezing from time to time. As I said I tried everything but nothing seemed to work.
Than just a few seconds ago, I thought "Hey, maybe I should try deleting it from my Administrator account." Than I switched to my Admin. Acc. Another funny thing is, when I changed acc. my PC was running fine, no freezing of any sort, went to the desktop from my other acc. and found the movie. I pressed delete, and in 0.0001 seconds it deleted the file no problem what so ever. Than I switched back to my regular acc. and again, the computer was running like it did before, fast and furious.
I want to thank all you boys and girls for your patience and good will. I am no computer expert, I have no idea what I did and why this worked for me.