windows 7 - Access denied to a folder after removing administrator permission

I wanted to encrypt a specific folder in my company domain and now I cannot access it.

This is Windows 7, I am administrator on of my PC.

On the folder I did right click->properties->security

for the System and Administrators I did Deny all. and for me (DOMAIN\ME) I gave full control.

Now I cannot access the folder. I tried to set the permissions back, but with no success