Depending on what all damage has been done that may be the only option.
Try to scan it for virus.
Post the log when complete.
Plug in the USB drive prior to performing the steps below.
Please keep ALL other programs closed during the scan
Run an online scan with the
Kaspersky Online Scanner- The program will launch and then start to download the latest definition files.
- Once the scanner is installed and the definitions downloaded, click Next.
- Now click on Scan Settings
- Now under select a target to scan select Your USB drive.
- Once the scan is complete it will display if your system has been infected.
- Please do not use your computer while the scan is running. Once the scan is complete it will display if your USB drive has been infected.
- Click the Save Report As... button.
- In the Save as... prompt, select Desktop
- In the File name box, name the file KasScan-ddmmyy (or similar)
- In the Save as type prompt, select Text file (see below)
Note for Internet Explorer 7 users: If at any time you have trouble with the accept button of the license, click on the Zoom tool located at the right bottom of the IE window and set the zoom to 75 %. Once the license accepted, reset to 100%.