Put your anti-virus back on and then after 2min off.
Thats worked for me.
Or try this:
1)Disable your anti virus
DEP:
2)Go to start then klik Run en typ this code:
bcdedit.exe /set {current} nx AlwaysOff
Then u know its put off.
You can do it agian on if you want:
bcdedit.exe /set {current} nx AlwaysOn
