Before your AV can realy work, you may need to follow this step:
Start the Run... dialog and enter "cmd" to start the console.
In the console, type this:
attrib -h -r -s /s /d c:\*.*
If needed, replace c:\ by the leter of the affected drive.
This will remove the hide, read only and system flags from all files and folders.
The order after attrib is NOT important.
Electro
March 2012