Four Methods to Remove DLL Virus
Many computer users come across DLL virus while they are using computer, and this kind of virus cannot easily killed by antivirus software, so here we introduce you four methods to remove DLL virus and you can choose one that is most suitable for you.
First, you need to check if you have updated drivers in your computer into the latest version, If you haven't update your drivers for a long time, you need to find the drivers for your computer right now. You can use Driver Updater to scan your computer and find the drivers you need to download or update.
Free Download Driver Updating Software
Before that, you need to know what kind of DLL virus is in your computer.
1. DLL file viruses written in a separate: These viruses are most likely to be cleared DLL virus, the principle is very simple. Virus writers can write a DLL file, and then start through the registry's Run key system or other places that can be loaded.
2. DLL virus that replace the system files: the hacker made the virus code into a DLL file that is match with the system, and rename the original DLL files. When encountered an application that requests the original DLL files, DLL virus starts a forward role in the "parameters" to the original DLL file. By this substitution method, DLL virus can act openly in the user's computer.
3. Dynamic embedded DLL viruses: These viruses can enter the system through some sorts of methods when system processes are running. Since the system can not terminate the process, the DLL dynamically embedded virus is difficult to remove.
No matter which way to start, DLL virus needs to start with an executable file, which is commonly known to programmer as "Loader". As long as the DLL virus starts, it will boot options through the registry to load, so you need to know the source of the virus DLL file name.
Here, we will take the NOIR-QUEEN DLL introduce the DLL Trojans as an example and introduce the method to clean DLL virus.
How to Remove DLL Drivers?
Step One: Find DLL Trojan Loader
NOIR-QUEEN will insert into the Lsass.exe process in the system in the form of DLL files. Since Lsass.exe is a system as a key process that can not be terminated. In that case, we must find the Loader of NOIR-QUEEN.
Using "Process hunter" tool can view all the Lsass process called by DLL files and compared to the information before infecting the virus, and it can find "QoSserver.dll" file has been added into Lsass process. With the operating system file search function, we found the QoSserver.exe file, this is the Loader of NOIR-QUEEN.
Step Two: End the Relevant Processes
Once your computer have infected NOIR-QUEEN virus, there will be a QoSserver.exe process in the Task Manager, you need to forced end this process. And in the "service" option, locate the service, and disabled it.
Step Three: Clean up the Registry
Using the registry to find services, type in "QoSserver" keyword, and delete the keys one by one.
When all operation is complete, restart your computer, then check if the NOIR-QUEEN is cleaned. In this way, we can manually remove the virus DLL. Since there are different kinds of DLL virus, there will be a little differences in each method. However, the steps are the same, first using tools to find the virus DLL Loader, and then take different measures to clean the virus according to the situation. It is complicated to remove DLL virus, and it is difficult to kill some of the stubborn DLL virus at one time. For some very strong hidden DLL virus, anti-virus software cannot clean them at all, so they must be removed using special method.
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