MSAV

"Microsoft antivirus" redirects here. For the later Microsoft anti-virus product, see Microsoft Security Essentials. For a malware masquerading as an antivirus, see MS Antivirus (malware).

Microsoft Anti-Virus (MSAV) was an antivirus program introduced by Microsoft for its MS-DOS operating system. The program first appeared in MS-DOS version 6.0 (1993 ^[1]) and last appeared in version 6.22. The first version of the antivirus program was quite rudimentary, had no update facility (though a single update became available), and could only scan for about 1,000 viruses. Microsoft Anti-Virus for Windows (MWAV), included as part of the package, could be run under Windows 3.x.

History

Microsoft Anti-Virus was supplied by Central Point Software Inc. (later acquired by Symantec in 1994 and integrated into Symantec's Norton AntiVirus product) and was essentially a stripped down version of the Central Point Anti-Virus (CPAV) product which, in turn, Central Point Software Inc., had licensed from Carmel Software Engineering in Haifa, Israel. Carmel Software sold the product as Turbo Anti-Virus both domestically and abroad.

Microsoft Anti-Virus for Windows was also provided by Central Point Software. This product became noted as determining that the upgrade program of Windows 95 was detected as a computer virus, something which was embarrassing to Microsoft.^[2]

Features

Both the MS-DOS and Windows versions of the latest product had common features; the "Detect and Clean" strategy of Microsoft Anti-Virus could scan for and detect 1,234 distinct viruses.^[3] Other features included the detection of boot sector and Trojan horse-type viruses which were the typical virus problems at the time.

The program also had an anti-stealth and check sum feature that could be used to detect any changes in normal files. This technology was intended to make up for the unavailability of regular update packages. The final virus definition update was released June 1996^[4] and was able to scan for 2,371 viruses.

References

1. ^ A History of Microsoft MS-DOS and Windows (and its main competitors) on the 8086 Processor family
2. ^ MS-DOS MSAV command help
3. ^ List of viruses detectable by MSAV
4. ^ [1]