I was doing a virus scan on an external USB drive and while AVG was scanning my system got locked up and required a reboot. Since that time all data on the external drive is no longer accessible. I can see all the files in the root and directorys but I cannot browse into any of them as Windows 7 gives an error stating they are corrupt.

If I show hidden files there is a hidden AVG directory that I know was not there to begin with and I am assuming it is some type of vault to protect files while being scanned. Well not the entire drives contents are unaccessible because I think whatever does the managing of the scan failed during the roobt and left the headers or something in a corrupt state.

Does anyone know how to 'unlock' or recover this data? Luckily I can recover this data from other sources as a last resort but I would like to fix this if possible.

Any help would be appreciated. Thanks.