i know all softwares which can give you detailed hardware info like siw,everest,cpuz,gpuz,sandra,etc
but none of them have this facility of comparing previous state to current state ..
thats what i am looking for ..
First of all
The parts which can be removed[as you afraid for them] is like RAM,HDD,battery etc.So u need to find serial no of that parts to compare.
The other's componenets maybe hard to remove or replaced & way to service the lappy is from authorised service centers,hope thats wheare you going.
Rest chill out