Guys , I've my MBA 2013 still under warranty , where can I go to upgrade my RAM and HDD ?

Guys , my mba about to expire in 10 days , should I get the apple protection plan ? is it worthy it ? heard it will cover the warranty for 3 years , say if my mba reached the battery cycle count of 1000 within that 3 years , will they replace it ?

Just anyone !

I have a MBA 2013 - which have two OS : OS Yosemite and Windows 7 Pro( Installed via Bootcamp) .

The other day , I tried to update Windows 7 to Windows 10 , everything was fine , until it's feel heavy plus I dont like the looks so I revert back to Windows 7 . It works but the keyboard and mousepad do not function at all , like seriously , I cannot even after multiple time login / log off , plugin every keyboard in every port , not at all , enter the bios to alter stuff , doesnt seem to work thus I fed up , I start yosemite , I remove the windows 7 boot camp via Utility desk and I thought might as well recover those windows 7 size to use it for yosemite , so I delete everything , try to install mac from scratch , it brings me to apple.com/support -2002F . help .