I have windows 7 very recently installed in my Laptop . I usually download a lot of softwares from isohunt or thepiratebay etc . But immediately my Norton Internet security 2013 discovers some sort of virus ( mostly trojan in it and moves it to quarantine ) . But sometimes I have restored some of these files and added it to the exclusion list . Later when I discovered that my laptop didn't respond well , I understood that it was because of these virus and then removed it by deleting the file maually . I always run frequent scans ( Eset online scanner , superantispyware , etc )( also every time when I scan with superantispyware , i find a lot of ad-wares ) . Now , I have got a new Internet connection in my house . With this connection my wifi is automatically not giving access to the Internet after using for a while . This is happening very frequently( it remains connected for 15 - 20 mins and then doesn't work . Immediately if I disconnect and connect back to the same network through wifi , it starts working . When it doesn't work , if I Ieave it so , it remains in the same way and never regains Internet connection back . It always requires me to disconnect and connect again ) . This is causing a lot of disturbance . At first I thought that this might be the problem of the new Internet connection . But , I am using the same Internet connection in another PC directly through wire connection ( not wifi ) . The Internet is always continuous and there is no disturbance in the PC . So , I want to know if this problem is because my PC is infected or is there anything else . Awaiting for your useful guidance !