program modification: sometimes, not only virus backdoor:win32/delf.bu or malware anti-hacker expert but also common softwares possessing the ability to modify the inner functions of vwifibus.sys, which means other programs can't find this dll file again.

This is all lower case. Can you fix that?
Program Modification: Sometimes, not only virus Backdoor:Win32/Delf.BU or malware Anti-Hacker Expert but also common softwares possessing the ability to modify the inner functions of vwifibus.sys, which means other programs can't find this DLL file again.