[HELP] Everything going wrong with my Alienware 14

So I bought an Alienware 14 back in April 2014. I got it delivered and everything was amazing. I loved it. About a month ago I had to reset my laptop to Factory settings (I used the disk that came in with the Laptop). That's when the problems started.

So I play League of Legends a lot, and I'd usually play with 150-200 fps, well now I play with 30-50 and its not just fps drops, its permanentally that low.

Also, my laptops seemed to turn into a *** desktop, everything is so slow AND it doesn't charge, so I'm stuck at 4% available (plugged in, not charging). So the momento I unplug it from the Wall it just hybernates.

And as if the previous 2 weren't enough, it also overheats a lot.

I have installed all the drivers from the dell website.

I contacted live customer support because apparently live tech support isn't available for my laptop's model and they told me that someone from dell's tech supp could remote control my laptop to see what's going on and try to fix it.

Also if the problema lies on my battery, I was wondering if I could order a new one for free if its within the warranty, idk if the battery replacements part of my warranty, which expires in less tan 20 days so I'd like an answer asap so I could order a new one.

Thank you