ØWhy any anti viruses even IMEN anti virus can not clean some variants of a virus or during the clean processing  the system will hang?

It occur when a file has been  infected by more than one virus or the virus has infected the file incorrectly, so the file data has been destroyed and the file could not be disinfected and then deleting the specific file is the  only way.

ØWhy after cleaning the " One Half " virus by some anti viruses except IMEN Anti Virus , some of the subdirectories becomes empty or some strange files with unacceptable size creates?

Because the hard disk data has been encrypted so this action has been done over those subdirectories too.

ØSome times IMEN Anti Virus shows a message that the virus is in memory but it is inactive. Is it dangerous for system?

If IMEN Anti Virus software during the system checking  finds a virus in memory, at first inactivates the virus in memory to prevent its spreading and then begins the cleaning. So if you check the system again  by IMEN Anti Virus after cleaning process, it will find the inactive virus in memory that has no danger to your system.

ØWhy some times IMEN Anti Virus software begins to loop during a subdirectory scan and again checks the files which has checked before?

This occur when the subdirectory structure is corrupted. For example there may be a subdirectory in that subdirectory which its entry address is the parent subdirectory address .So the program fall in loop. The solution is quitting the program and solve the problem with some software like NDD. Of course if the subdirectory's data is important for you, before using NDD, contact us to inform you exactly.