Windows 7 can't open the task manager's fault

The registry, the task manager can not be opened or the hard disk is occupied without any reason. After killing the Trojan with killing soft, only the task manager can not open, the phenomenon is not that the appearance of the pop-up manager disappears immediately, but The mouse only flashes gently and nothing happens. The specific symptoms are as follows:
The method of setting the task manager with regedit or Gpedit.msc is invalid, copying the new taskmgr.exe to system32.dllcache is also invalid, safe mode The same is the same, the Windows 7 CD repair installation is invalid, the next manager on the Internet is useless.
In fact, as long as this can be a normal exe file, rename it to taskmgr.exe, it will become this phenomenon, as long as taskmgr.exe changed the name abc.exe can run, but put Another file such as notepad.exe changed to taskmgr.exe will not run.
This is a typical image hijacking. The principle is that the Trojan virus has image hijacking, and many executable programs are mapped to the ntsd.exe file, so it cannot be opened. ntsd.exe is the debugging command that comes with the Windows system. It should be that the virus is called by the virus and this command terminates the process. The solution is very simple, open the registry editor, navigate to hkey_local_machine\\SOftware\\Microsoft\\Windows NT\\CurrentVersion\\Image File Execution Options, then clear all the items under Image File Execution Options and then download the latest killing soft killing Trojan Can solve the problem.