Security must not be a privilege. Under this motto, Emsi Software provides the Malware scanner a-squared Free completely free of charge for private use. But it is not a very limited version, it is a full tool to clean your computer from Malware. Not only Spywares, as detected by classic Anti-Spyware programs, but also especially Trojans, Backdoors, Worms, Dialers, Key loggers and a lot of other destructive pests, which makes it dangerous to surf the web.

The advantages to you:
•Frees your PC from Malware
•Quarantine for emergency
•Exceptionally easy to use

a-squared reliably detects:
•Trojans, Backdoors, Key loggers
•Spyware, Adware, Tracking Cookies
•Worms, Bots, Viruses
•Dialers

Malwarebytes' Anti-Malware can detect and remove malware that even the most well known anti-virus and anti-malware applications fail to detect. Malwarebytes' Anti-Malware monitors every process and stops malicious processes before they even start.

Key Features:
 •Light speed quick scanning.
 •Ability to perform full scans for all drives.
 •Malwarebytes' Anti-Malware Protection Module. (requires registration)
 •Database updates released daily.
 •Quarantine to hold threats and restore them at your convenience.
 •Ignore list for both the scanner and Protection Module.
 •Settings to enhance your Malwarebytes' Anti-Malware performance.
 •A small list of extra utilities to help remove malware manually.
 •Multi-lingual support.
 •Works together with other anti-malware utilities.
 •Command line support for quick scanning.
 •Context menu integration to scan files on demand.

RootkitRevealer is an advanced rootkit detection utility. It runs on Windows NT 4 and higher and its output lists Registry and file system API discrepancies that may indicate the presence of a user-mode or kernel-mode rootkit.
 
RootkitRevealer successfully detects many persistent rootkits including AFX, Vanquish and HackerDefender (note: RootkitRevealer is not intended to detect rootkits like Fu that don't attempt to hide their files or registry keys).
 
Since persistent rootkits work by changing API results so that a system view using APIs differs from the actual view in storage, RootkitRevealer compares the results of a system scan at the highest level with that at the lowest level. The highest level is the Windows API and the lowest level is the raw contents of a file system volume or Registry hive (a hive file is the Registry's on-disk storage format).
 
Thus, rootkits, whether user mode or kernel mode, that manipulate the Windows API or native API to remove their presence from a directory listing, for example, will be seen by RootkitRevealer as a discrepancy between the information returned by the Windows API and that seen in the raw scan of a FAT or NTFS volume's file system structures.