Thread: Help!-Not able to delete files

I was recently stuck by virus this post (Not able to view hidden folders-Virus problem) Now i had downloaded a movie which now i want to delete to free my space in D:\.But now i am not able to delete because an error comes which MEANS that-Program is in use(its in process).Now i dont understand how that movie process can be running when i myself shut down it and also restarted the computer.
I am attaching the error pic here.Pls guide if u know.pls post only if u know the solution or if anyone can tell me how to find out which process is it(of this .avi file) so that i can end process and then delete the file.
untitled1.jpg

It would be good to press Alt+contol and del. You would get Task manager. Just close all operations expect System operation and after this i think you would be able to dele your file.