On-access-scanner meaning

Relates to the constant monitoring of the file system on workstations and servers. For anti-virus software effectiveness, it is important that a computer virus be found and then blocked before it is activated. Therefore, every time a file is accessed for reading or writing, or whenever a program is launched, the on-access scanner is invoked. The on-access scanner literally scans the file. Although on-access scanning is a quite secure way to check for viruses, it is not well liked by sophisticated users because of its adverse impact on performance. SAV25 Data Systems. SAV25 Data Systems. [Online, 2000.] SAV25 Data Systems Website. http://www.sav25.com/norman/nvc/nvc_corp_features.htm.
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