W32/Cleancossta Trojan Removal Tool. - Version 1.0 cleancossta.exe will detect and remove W32/Cleancossta Trojan completely, from your system. Download the cleancossta.exe and save it in a temporary directory. Double click on cleancossta.exe to execute it. Follow the user-friendly instructions to detect and remove the W32/Cleancossta Trojan from your computer.