I ran the avast driver app on my Asus pc the app knocked out my graphics and I can't use my pc anymore, one of the tecs at avast tried to fix the problem with out success, he told me a senior tec would be in touch to help I have now been waiting 4 days and every time I get in touch with them I am told I will have to wait for the senior tec to get in touch with me, totally a rubbish aftersales service.