Trojan / Backdoor.Trojan remove (ernse.exe)

Open Task Manager by pressing (ALT+CTRL+DEL)
Go - Processes then find out the ernse.exe proces in image name.
Click on ernse.exe and press End Process

Now open My computer -> C:

In menu bar go Tools -> Folder Option-> View
Click on Show Hidden Files and Folder
Uncheck Hide Protected.....
Then Apply and ok
you see on ur c: drive a folder name users....
Just Delete it

Hack to Remove/Uninstall Symantec Norton Antivirus (SAV) Client without Password

Norton AntiVirus Clients or Symantec AntiVirus Clients especially Corporate Edition Clients can be installed as managed network setup type by a Symantec AntiVirus Server. When a Symantec AntiVirus Client is managed, it will prompt for password when uninstalling client via local computer Control Panel Add or Remove Program applet. If you don’t know or forget the password, then the client is not able to uninstall or remove. And the SAV client uninstall password won’t work with server group password too, as if you enter that password, you will receive an invalid password message.

remove Symantec Antivirus without using a password:
Open Registry Editor (regedit).
Navigate to the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\INTEL\LANDesk\VirusProtect6\CurrentVersion\Administrator Only\Security\
Change the value for useVPuninstallpassword key from 1 to 0.

Exit Registry Editor and now you can uninstall Symantec AntiVirus Client.
The trick should work on most version of Symantec AntiVirus client or Norton AntiVirus Client, including version 7, 8, 9 or 10.