Win 10 Update has to be downloaded in one go or can it be downloaded in parts and at different times???? My isp isn't great.I cant download 3 gb file in one single unbroken connection.Update already failed 3 times.
Use CPU-Z application check specification of your already installed Ram under memory and spd tab.
I think it should be 1600 mhz, Ram timing: 11-11-11-28 and 1.35 volts
Buy any one of these:
http://www.primeabgb.com/gskill-f3-1600c11s-4grsl-notebook-ram-memory.html...
Check this :http://www.findyogi.com/laptops/hp/hp-pavilion-15-ab028tx-m2w71pa-ci3-4gb-1tb-win8-1-2gb-graphic-b986dc/price
Offer:HP has back to school offer for this laptop...
There is a coupon based 9% discount going on ebay for july. I dont remember the coupon code but its in ebay deals section on techenclave or in digit forum [i dont remember] . Use it and get it at 54.5k.
EDIT : maybe 15EBAYDEAL