Metadefender
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Introduction
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Metadefender is an SDK, which allows integration of various antivirus engines 
into applications for real time scanning. Metadefender is not an end-user 
application but the library for software developers. Using Metadefender, you 
can integrate antivirus engines from Avast!, ClamAV, QuickHeal and VirusBuster EDK 
into your application. No antivirus can detect threats with 100% guarantee. 
Metadefender, which unites several different antivirus engines increases 
probability of successfully detecting malware.

Different antivirus scanners (Avast!, ClamAV, QuickHeal and VirusBuster) 
used in Metadefender allow the software to get virus signatures, which are 
important for detecting the newest viruses, considerably faster. So the risk 
for the system to get infected by some new virus is dramatically reduced. 
Actually, not a single antivirus software product can be the first to detect 
new viruses ALL THE TIME. There are a lot of reasons why different companies 
respond to each new virus attack with different delays. Having quite a few of 
antivirus engines bundled together takes your chances of detecting a new threat 
by at least one of them to a new level. Moreover, even if you have all your 
virus databases updated, differences in virus detection methods used by 
different engines increase the possibility that one of these methods will be 
good at detecting a new variation of some malware. To sum it up, using as many 
available antivirus engines as possible makes your computer system as protected 
as never before.

Metadefender includes annual licenses to the following built-in engines:
------------------------------------------------------------------------
- Avast!
- ClamAV
- QuickHeal
- VirusBuster EDK

 
Product Benefits
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- Use several antivirus engines simultaneously.
- Scan files, archives and e-mail messages. 
- Quickly integrate antivirus into your application. Easy to use and install. 
- The same API for all used antivirus engines.
- Support for a large number of file types. 
 
Product Features
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- High performance. 
- Infected files can be cured instead of being deleted.
- Infected or suspicious files are isolated in the quarantine zone.
- High detection rates for viruses and spyware. 
- Automatic update of virus definitions multiple times per day. 
 
System requirements 
-------------------
- Windows 2000/XP/2003/Vista operating system. 
- CPU Pentium 133 or higher. 
- 64 MB RAM (recommended 128 MB). 
- 50 MB hard drive space or more. 
- Internet access (to download virus definitions). 
 
Supported Archive types 
-----------------------
- Ace, Arj, Zip, RAR, Tar, Gzip, Bzip2, Cab, Iso.
 
Supported File Types
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- OLE2, Cabinet, CHM, BinHex, SIS. 
- built-in support for almost all mail file formats. 
- built-in support for ELF executables and Portable Executable files compressed 
  with Aspack, UPX, FSG, Pecompat, Petite, tnef, NsPack, wwpack32, MEW, Upack 
  and  obfuscated with SUE, Y0da Cryptor and others. 
- built-in support for popular document formats including MS Office and 
  MacOffice files, HTML, RTF and PDF. 
 
Supported Development Tools 
---------------------------
- Microsoft Visual C++, Microsoft Visual Basic, Microsoft Visual Studio .NET, Microsoft Visual Basic .NET, Microsoft Visual C# or any other programming language.

Differences between the trial and the full version
- Nag-screen at application startup. 
- The size of scanning data is limited to 10 Mb. 
- a 10-second delay after scanning each file.
- The evaluation version will run for 15 days after installation. 
- The trial version cannot be used in commercial applications. 

Installation
------------

Make sure that your computer is connected to the Internet before installing 
Metadefender so that it will be able to download latest versions of virus 
definitions. Launch setup.exe and choose an installation folder. After the 
installation process is over, the updater will automatically run and download 
the latest versions of virus definitions to your computer.

Note: if for some reasons virus definitions were not successfully updated 
during the installation process, you should reinstall Metadefender or reboot 
your PC after the first successful invocation of the MD_DatabaseUpdate function 
from your application (you only have to do this once, after the first update in 
order to maintain compatibility between different versions of antivirus engines 
and virus definitions).

The Metadefender uses the Clam AntiVirus scanner. Before installing Metadefender, 
make sure that the Clam AntiVirus scanner is installed.


Uninstalling Metadefender
-------------------------

To remove Metadefender from your system, do the following:
- Close all applications that use Metadefender.
- Go to Windows Control Panel/Add/Remove Programs, select Metadefender and 
  choose the Remove option.
- Confirm the deletion of all files and directories created by Metadefender.

Feedback and Support
--------------------

We strive to improve the quality of our documentation, so if you have any 
comments, questions or suggestions, please contact us at support@metadefender.com. 
Your feedback is much appreciated.
