The tool is not a substitute for antivirus software, but it may be extremely helpful to detect completely hidden threats and have high privileges in the system, such as rootkits. In addition, the TDSSKiller tool is free and easy to use.

The tool scans your system in approximately 15 seconds, although this may vary depending on your computer. It is able to detect and remove malware Rootkit.Win32.TDSS, bootkits which is a malware that attacks the master boot record on the computer's motherboard and that runs even before the operating system loads.
To use it, you just need to download the executable file TDSSKiller.exe, run this file on the computer you want to scan, press start scan, wait for analysis and disinfection, and then restart Windows.

You can run the tool in normal mode or in safe Windows mode and you can download it via the following link: TDSSKiller