When i click my drive,

Hi there,
You seem to be suffering from a Trojan horse. you need a good anti virus to scan the drives of both your computer and the external hard disk, I recommend Avira Personal.http://www.free-av.com/ this links to a free download package. if avira does not install then you need to restore the computer to the date the operating system was installed or do fresh installation. Avira can only be installed over the internet. the virus has secured the flies and folders. you can either change the ownership of the folders and files or you run corrupted recovery for your data. i recommend you use "bad copy pro " from jusoft you can download it from www.torrentportal.com.
try it and believe me it will work.
thanks