What’s that ? And how to remove it ? Thank you 
Sorry for my bad english :-\
- Which Avast…? (Free/Pro/IS/Premier)
- Which version…?
- OS…? (32/64 Bit…? - which SP/Build…?)
http://lmgtfy.com/?q=what+is+avast+ng
It is part of the virtualization component.
You can add/remove it the same way as you can do with many of the extra components, through control panel.
Free
11.1.2241
32B
- Control Panel → Add/Remove programs → Avast → Change
- Untick “Secure Virtual Machine”.
- Follow instructions.
- Reboot.