Method 1: Disable the anti-virus software, take Avast as an example:
- Disable the Hardware Visualization on Avast. Open Avast and click “Menu” on the upper right
![](https://www.bignox.com/blog/wp-content/uploads/2020/03/74C18905-B6FC-473d-9612-C8A7827C2CAE.png)
2. Click “Settings” to view more details
![](https://www.bignox.com/blog/wp-content/uploads/2020/03/CDF4C915-2389-4143-9F43-362B168FE785.png)
3. Select “General“→” Troubleshooting“→ and disable the “Hardware-assisted Virtualization”
![](https://www.bignox.com/blog/wp-content/uploads/2020/03/625ACBFE-895A-4cc9-9805-F54DF5B96672.png)
- Add NoxPlayer to the white list
- Open Avast and click “Menu” on the upper right
![](https://www.bignox.com/blog/wp-content/uploads/2020/03/74C18905-B6FC-473d-9612-C8A7827C2CAE.png)
2. Click “Settings” to view more details
![](https://www.bignox.com/blog/wp-content/uploads/2020/03/CDF4C915-2389-4143-9F43-362B168FE785.png)
3. Select “General“→” Exceptions“→ and click “Add Exception”
![](https://www.bignox.com/blog/wp-content/uploads/2020/03/2930181A-6CB7-4368-A0B0-3DD22CA708B9.png)
4. Add the download path to the exception (Based on your own download path), such as
D:\Program Files\Nox\bin
C:\Program Files (x86)\Bignox\BigNoxVM
![](https://www.bignox.com/blog/wp-content/uploads/2020/03/3A2D20BE-B6F9-4e09-A1D7-A865F055CB1F.png)
Method 2: Disable VT
Click here to check the guide.