Freeware Antirootkit Software

Think your computer is infected by something your antivirus isn't picking up, and you think you might be infected by a rootkit? Sophos rootkit remove makes quick work of finding and removing rootkits from Windows PCs..
Download Sophos Anti-Rootkit Software 1.5.4 (from Rootkit Scanners and Removal Software)

Recommended Antirootkit Software | 1.31 MB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XP | Free

AVG Anti-Rootkit is a legacy product which is still able to scan and find rootkits hidden on your computer. The standalone program (this one) still does a good job though of finding hidden rootkits on your computer. It is a freeware rootkit remover and makes the task of finding these nasty programs easy. A review of AVG Anti-Rootkit Free has also been published.
Download AVG Anti-Rootkit Free 1.1.0.42 (from Rootkit Scanners and Removal Software)

414 KB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XP | Free

RootRepeal is a new rootkit remover and is not yet out of the beta stage yet it still finds and removes rootkits. It is a freeware application and highly recommended, even if it isn't yet out of beta. It is a free download. A review of RootRepeal - Rootkit Detector has also been published.
Download RootRepeal - Rootkit Detector 1.3.5 (from Rootkit Scanners and Removal Software)

rootrepeal cnet
461 KB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XP | Free

Anti-rootkit utility, TDSSKiller, removes malware from the Rootkit..
Download TDSSKiller 2.8.16 (from Rootkit Scanners and Removal Software)

2.0 MB | For Windows 7, Windows 8 / Vista / XP | Free

ThreatExpert Memory Scanner is the perfect companion rootkit remover with a great team of developers behind it. If you're looking for a rootkit removal program which can get by what your antivirus solution can't find, this program is worth a look and since it's freeware, a free download and a quick scan. A review of ThreatExpert Memory Scanner has also been published.
Download ThreatExpert Memory Scanner 1.0.1.0 (from Rootkit Scanners and Removal Software)

1,481 KB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XP | Free