Select the check boxes next to the areas of your computer that you want to scan.
Select the Extensive scan check box to scan every file on your computer during the Local hard drives scan instead of just the hidden ones.
Note: Selecting this option will potentially find more rootkits, but the scan will take longer to complete. Depending on your computer, the time taken for this may be over an hour.
Click Start scan or press Enter.
When the scan is complete, a dialog box is displayed showing whether Sophos Anti-Rootkit has found any suspicious files.