My dell inspiron 15 3000 series 3542 is plugged in but not charging, SOMETIMES when i move it around it will start charging so im guessing short and i do have a hardware warranty on it. My other question is that like 2 minutes after startup my hdd will spike in either up and mouse freezing for max power until it stops (lucky me i got the touchscreen one so i can partially use it ) or it will spike to 100% for like 1/2 a second and do that for how ever long it wants. when i went to task manager i clicked on it to show top running processes and it says 0.1-0.5 mb a second but will sometimes spike to 15-20 mb a second for processes like notepad and still will not crash. it just freezes. on another note the memory is acting up on startup to where when i run taskmanager it is hovering for 3.8-3.9 gb . i dont want to pay 75 bucks for new ddr3L 8 gb memory and so, how should i go software wise and hardware wise. if it does include the use of the HARDWARE ONLY warranty, how would i go about this thanks.