Reasons why some viruses cannot be cleared

One is to remove the virus program code from the infected file (for example, if a 10 K file is infected with a 2 K Virus and becomes 12 K, restore to a normal file of 10 KB). This is called clearing. 1. Why can't some viruses be cleared (not running) and can only be isolated but not cleared? The so-called antivirus software has two cases. One is to remove the virus program code from the infected file (for example, if a 10 K file is infected with a 2 K Virus and becomes 12 K, restore to a normal file of 10 KB). This is called cleanup. One is to delete the entire Virus File (because the file is full of virus program code) this situation is especially prone to Troy Trojans, worms and other viruses, which are isolated. 2. Will the residual files after virus cleanup be automatically deleted after virus cleanup? No. Some viruses, Trojans, backdoors, and other malware write some files in the system to record their own running status or to record the data obtained from the system. Because these files are used to record data, they are no different from normal pure data files and are not capable of execution, so they will not be detected, the corresponding file will not be processed automatically. 3. Why do other software sometimes think that a file is a virus, but some think it is not a virus? There are some minor differences in the identification standards of viruses by various anti-virus manufacturers, resulting in the detection results of some manufacturers of some files but not those of other manufacturers. For example, if a program requires the customer to recognize its End User License Agreement during execution, Trend Micro will not detect it as a virus, while other manufacturers may detect the program as a virus. 4. The virus is constantly detected. Will our virus code keep increasing? In the current situation, as new viruses are detected, new virus features will be added to the virus pattern, and our virus pattern will continue to increase. 5. Will the Scan Engine continue with the virus if the scan engine is not updated? A virus code contains specific characteristics of a virus. The Scan Engine compares these features to determine whether the scanned file is a virus. Therefore, theoretically, the virus can be detected as long as the virus code contains the characteristics of the relevant virus. 6. What Should customers do if they want to delete isolated virus files if they are system files? As system files are part of the operating system, we recommend that you use the original operating system installation disk to restore the corresponding files. 7. For files that cannot be cleared from the quarantine area, can you wait until the new antidote is released to clear the virus in the file? Files that cannot clear viruses may be generated in the following two cases: the file itself is a virus file rather than Virus Infected with other files. In this case, only isolation or deletion measures can be taken, because the file contains only virus code and there is no clearing problem. The virus uses some special methods to infect files and processes the infected files. So that the anti-virus software cannot effectively restore the original file. However, it is not ruled out that it can be cleared with the improvement of anti-virus software!