At present, scanners are the most popular and the most widely used kind of antivirus programs. There are some variations of the scanning technique, such as virus removal programs (programs which can “repair” the infected objects by removing the computer virus from them), scheduled scan (programs which are always active in memory and scan every file before it is executed), virus identifiers (programs which can identify the particular virus variant exactly by keeping some type of map of the non-modifiable parts of the virus body and their checksums), heuristic analyzers (programs which scan for particular sequences of instructions which perform some virus-like functions), quick scan, full scan and custom scan, so on.
The reason to use this kind of antivirus program is so widely today is that they are relatively easy to maintain. It is especially true for the programs that they just report the infection by a known virus variant, without trying exact identification or removal. They are composed primarily of a searching engine and a database of code sequences (which are often called virus signatures or scan strings) which are present in the known computer viruses.
Moreover, scanning of ‘RAM Antivirus’ is the only way to detect computer viruses before they get the chance to be executed. Bearing in mind that in most operating systems for personal computers the program which is executed has the full rights to access and/or change any memory location (which consists the OS itself), it is preferable that the infected programs do not have any chance to get executed.
At the same time, it is very tough to keep an antivirus up-to-date. The author of the scanner must obtain a sample of the virus, disassemble it, understand it, pick a good quick scan which is characteristic for this virus and is impossible to cause a false positive alert, incorporate this string in the RAM Antivirus, and ship the update to the users, in order to produce an update, which can detect a particular new virus. It can take quite lots of time. While new PC viruses are created every day – with a current rate to 100 per month, very few antivirus producers such as RAM are able to keep up-to-date with such a production rate.
One can even say that the scanners are somehow responsible for the existence of so many virus variants. Actually, because it is so easy to modify a virus in order to avoid a particular scanner, lots of “wannabe” virus authors are doing so. But, the fact that the scanners are obsolete as a single line of defense against the computer viruses became clear only with the appearance of the polymorphic viruses.
How Quick Scan Helps You?
The ‘Quick Scan’ allows you to scan quickly the essential files of your PC which are most vulnerable to infection from viruses, threats, rootkits and other malware. Area scanning includes system memory, auto-run entries, hidden resources, boot sectors and other important areas like vital registry keys and system files. These areas are of great importance to the health of your PC so it is necessary to keep them free of infection.
Important features of Quick Scan are:
- It is a signature independent scan.
- Quick Scan of ‘RAM Antivirus’ does not scan the entire system for suspicious files.
- It scans only critical areas of your computer which are most likely to contain malicious files.
- This quick scan of ‘RAM Antivirus’ antivirus scan is fast and provides the accurate result in case your system is infected with malware.