First, please update Bitdefender to be sure you have the latest virus signatures: open the main interface using the Bitdefender icon from your desktop. Click the Update panel from the main Bitdefender interface.
After the update is complete, please run a System Scan: at the Protection panel, go to the Antivirus module where you should have the System Scan.
At the end of the scan, a scan log will be generated.
Click on Show Log and when the new window opens, click on Save Log.
The scan log will be saved by default on your Desktop and will have a name like in this example: 1377703739_1_01.xml