Well migrating from XP to windows 7 it is a huge pain to work with files sometimes,because the permission of the files changed automatically and and need to be changed to be used properly,taking the ownership of the file also help,but I didn't know how to change the permission of all the files at once as whenever you select multiple files and right click on them the security bar do not appear unlike XP,here is the 2 command that can do the job for you(for me the last one worked like a magic).
Use takeown from the command prompt to take ownership a folder and all subfolders & files recursively:
Art School Confidential(2006):Who said anything about talent?
IMDB Rating 6.3/10
Starting from childhood attempts at illustration, the protagonist pursues his true obsession to art school. But as he learns how the art world really works, he finds that he must adapt his vision to the reality that confronts him.
A young woman's quest for revenge against the people who kidnapped and tormented her as a child leads her and a friend, who is also a victim of child abuse, on a terrifying journey into a living hell of depravity.