Within 2-3 min the system is hanging. I did low level format and tried to connect but the problem is same. I changed the RAM and operating system (almost everything). My ISP is a MNC (they are saying that we use high end routers and firewalls to protect from virus, we are giving assurance that there is no virus from our side) but coming to my side the system is hanging when I tried to connect the internet. I installed spyware, malware everything but no use. Please give the appropriate solutions for my problem.