Windows security software

FreeOTFE is a discontinued open source computer program for on-the-fly disk encryption (OTFE).

DiskCryptor is a full disk encryption system for Microsoft Windows that allows the encryption of an PC's entire hard drive or individual partitions – including the ability to encrypt the partition and disk on which the OS is installed.

Sandboxie is a sandbox-based isolation program developed by Invincea (which acquired it from the original author Ronen Tzur), for 32- and 64-bit Windows NT-based operating systems.

RootkitRevealer is a proprietary freeware tool for rootkit detection on Microsoft Windows by Bryce Cogswell and Mark Russinovich.

Avira Operations GmbH & Co.

Kaspersky Anti-Virus (Russian: Антивирус Касперского (Antivirus Kasperskogo); formerly known as AntiViral Toolkit Pro; often referred to as KAV) is an antivirus program developed by Kaspersky Lab.

TrueCrypt is a discontinued source-available freeware utility used for on-the-fly encryption (OTFE).

ESET NOD32 Antivirus, commonly known as NOD32, is an antivirus software package made by the Slovak company ESET.

Malwarebytes Anti-Malware (MBAM) is an anti-malware software for Microsoft Windows and macOS that finds and removes malware.

ClamWin is free, open source antivirus software for Microsoft Windows.

VeraCrypt is an open-source utility used for on-the-fly encryption (OTFE).

The Metasploit Project is a computer security project that provides information about security vulnerabilities and aids in penetration testing and IDS signature development.

ZoneAlarm is an internet security software company that provides consumer antivirus and firewall products.

Avast Antivirus is a family of antivirus software and internet security applications developed by Czech technology company Avast Software for Microsoft Windows, macOS and Android.

AVG AntiVirus (previously just AVG, abbreviation of Anti-Virus Guard) is a family of anti-virus and Internet security software developed by AVG Technologies, a publicly traded Czech company formerly known as Grisoft.

In the field of computer network administration, pcap (packet capture) consists of an application programming interface (API) for capturing network traffic.

Deep Freeze, by Faronics, is an application available for the Microsoft Windows, and Mac OS X operating systems which allows system administrators to protect the core operating system and configuration files on a workstation or server by restoring a computer back to its original configuration each time the computer restarts.

Enigmail is a data encryption and decryption extension for Mozilla Thunderbird and the SeaMonkey internet suite that provides OpenPGP public key e-mail encryption and signing.

Microsoft Security Essentials (MSE) is an antivirus software (AV) product that provides protection against different types of malicious software such as computer viruses, spyware, rootkits and Trojan horses.

TextCrypt is an encryption software product produced by SubRosaSoft.

Prevx is a computer application designed for the removal of and protection from malware.

Webroot Antivirus with Spy Sweeper, previously known as Webroot AntiVirus with AntiSpyware, is an antimalware utility developed by Webroot Software.

Webroot Internet Security Complete is a computer security software program for Microsoft Windows users that combine SaaS cloud protection with traditional antivirus and antispyware desktop technologies.

Webroot Window Washer was a tool designed to protect user's privacy by permanently deleting all traces of web browsing history and other personal information files on a computer running Microsoft Windows.

Plink (PuTTY Link) is a free and open-source (MIT license) command-line network connection tool similar to UNIX ssh written by Simon Tatham, author of another popular terminal emulator, serial console and network file transfer application name PuTTY.

Verisys is a commercial file integrity monitoring solution for Windows, Linux and network devices, developed by the UK-based company Ionx.

Quick Heal Technologies Ltd.

Cain and Abel (often abbreviated to Cain) is a password recovery tool for Microsoft Windows.

CipherShed is under development as a planned source-available disk encryption program for on-the-fly encryption.

Windows SteadyState (formerly Shared Computer Toolkit) is a discontinued freeware tool developed by Microsoft that gives administrators enhanced options for configuring shared computers, such as hard drive protection and advanced user management.

Solution9, formerly known as Element Anti-Virus, is an antivirus software and Personal firewall package made by the software house, Strayspark Lab (Formerly Element Software UK LLC).

Evidence Eliminator was a computer software program that ran on the Microsoft Windows operating system.

GMER is a software tool written by a Polish researcher Przemysław Gmerek, for detecting and removing rootkits.

XOFTspy Portable Anti-Spyware is a proprietary application developed by ParetoLogic Inc.

Cisco Security Agent (CSA) was an endpoint intrusion prevention system made originally by Okena (formerly named StormWatch Agent), which was bought by Cisco Systems in 2003.

McAfee VirusScan is an antivirus program created and maintained by Intel Security (formerly known as McAfee, Inc., and Network Associates prior to that).

McAfee Change Control is a commercial file integrity monitoring solution for Windows- and Linux-based systems developed by McAfee.

Padvish Antivirus, commonly known as Padvish, is an antivirus software package developed by the Iranian company Amnpardaz.

Symantec Endpoint Protection, developed by Symantec Corporation, is an antivirus and personal firewall software for centrally managed corporate environments providing security for both servers and workstations.

mks_vir (formerly: MkS_Vir) – Polish antivirus program, created by Marek Sell in 1987.

Gpg4win is an email and file encryption package for most versions of Microsoft Windows, which uses GnuPG public-key cryptography for data encryption and digital signatures.

This is a non-exhaustive list of notable antivirus and Internet Security software, in the form of comparison tables, according to their platform (e.g. desktop and server, mobile, etc.) and their operating systems (e.g. Windows, OS X, Linux, Solaris, Android, iOS, Ubuntu Touch, Windows Phone, etc.).

Reboot Restore Rx by Horizon Data Sys, is a freeware application for Microsoft Windows that acts as an alternative to Windows SteadyState in that it allows users to restore the computer back to an established baseline.

Shade sandbox is a sandbox-based isolation program developed by Cybergenic corporation where the original author Eugene Balabanov stands as a co-founder.

Private Disk is a disk encryption application for the Microsoft Windows operating system, developed by Dekart SRL.

RogueKiller is an application for computers running under the Microsoft Windows operating system conceived to remove generic malware and advanced threads like rootkits and stubborn rogue security softwares.

ngrep (network grep) is a network packet analyzer written by Jordan Ritter.

Microsoft's Enhanced Mitigation Experience Toolkit (EMET) is a freeware security toolkit for Microsoft Windows.

UDP Unicorn is a free and open source DoS attack software.

Immunet is a free, cloud-based, community-driven antivirus application, using the ClamAV and own engine.

CimTrak is computer software for file integrity monitoring and regulatory compliance auditing.

DriveSentry is an antivirus program, developed by DriveSentry Inc, to protect Microsoft Windows users from malware.

logparser is a flexible command line utility that was initially written by Gabriele Giuseppini, a Microsoft employee, to automate tests for IIS logging.

SUPERAntiSpyware is a software application which can detect and remove spyware, adware, trojan horses, rogue security software, computer worms, rootkits, parasites and other potentially harmful software applications.

CounterSpy is a proprietary spyware removal program for Microsoft Windows software developed by Sunbelt Software.

* Webroot has discontinued support for Spy Sweeper as of 12/31/2012.