is windows defender an antivirus in windows 7
Windows Defender Windows Defender, officially called Windows Defender Antivirus in Windows 10 Creators Update, is an anti-malware component of Microsoft Windows. It was first released as a free antispyware program download for Windows XP, shipped with Windows Vista and Windows 7 and made into a full antivirus program replacing Microsoft Security Essentials as part of Windows 8 and later versions.
Antivirus software Antivirus or anti-virus software (often abbreviated as AV), sometimes known as anti-malware software, is computer software used to prevent, detect and remove malicious software.[1]
Hyper-V Hyper-V management tools are not compatible with Windows Vista Home Basic or Home Premium[51][51] or Windows 7 Home Premium, Home Basic or Starter.
Adware When the term is used in this way, the severity of its implication varies. While some sources rate adware only as an "irritant",[25] others classify it as an "online threat"[26] or even rate it as seriously as computer viruses and trojans.[27] The precise definition of the term in this context also varies.[c] Adware that observes the computer user's activities without their consent and reports it to the software's author is called spyware.[29] However most adware operates legally and some adware manufacturers have even sued antivirus companies for blocking adware.[30]
Malware Once a malicious program is installed on a system, it is essential that it stays concealed, to avoid detection. Software packages known as rootkits allow this concealment, by modifying the host's operating system so that the malware is hidden from the user. Rootkits can prevent a malicious process from being visible in the system's list of processes, or keep its files from being read.[25]
Antivirus software There are competing claims for the innovator of the first antivirus product. Possibly, the first publicly documented removal of an "in the wild" computer virus (i.e. the "Vienna virus") was performed by Bernd Fix in 1987.[22][23]