Pc scan causes system restart after 18% scan

Hello Costa. I apologize for the inconvenience caused. I certainly understand your concern. I have sent you an email instruction to get connected with our technical support team. Please follow those instructions to get in touch with them and you should be able to resolve your issue.Thank you.

While running the full system scan on my pc , the pc will suddenly restart at around 18%, I tried this sveral times and it always happens.
Just before restarting the threat counter starts to increase and goes up to number 5, then the 'Start ' bar showsat the bottom of the screen, but this is a different grey start bar with very low graphic resolution, and not the start bar I have usually appear on my PC, then system restarts.
After reading several older AVG forums I am curremtly running the scan without the 'Scan Sysytem Enviroment' box checked, and this seems to be working as the scan is now over 30% and still running.

I am currently running AVG version 2015.0.6125

Hello Costa. I apologize for the inconvenience caused. I certainly understand your concern. I have sent you an email instruction to get connected with our technical support team. Please follow those instructions to get in touch with them and you should be able to resolve your issue.Thank you.