Access Denied on deleting a folder

Hi,
There is a folder on my hard drive that i no longer can access. When i try to access the folder, i receive an error message saying:
Access Denied.
I scanned my computer using AVG Internet Security and it detected and removed a virus.
I still cannot access my folder.
Is there any way to remove this message and allow me access to my folder. I am an administrator on my computer, but still cannot access this folder.
I tried copying this folder and also deleting it ,but i could not. I get another error message saying: cannot delete file access denied.
Thanks for your help.
