User blog comment:Klonoamiyumi/MORE Laptop Issues/@comment-5961377-20140413004427

Hmm, blue screens may be a sign of the motherboard dying, that would be very bad.

You said you bought a new battery, right? If it seems to discharge quickly, use that warranty and get it replaced (assuming it wasn't a second-hand battery).

Download Avast antivirus, it's pretty decent and free. Might as well pick up MalwareBytes, the #1 virus scanner in the world - the free version is just a scanner though, and not a full antivirus that offers full-time protection.