laptop has started hanging

1. Clean the vents and heatsinks. Since there are many good YouTubes on this I pause here.
2. Factory reset the laptop. If Windows, backup your stuff again, then do a full Windows reset.
3. If items 1 and 2 fail to fix it, talk to the seller about their warranty. If no warranty, get repair estimates.

I do not let any NoteBook leave this place without a Cool Pad at the very least they stop the airvents getting cloged with gunk and extend the life of the NoteBook.

Also you did not say how long you have had this thing for as gunk takes time to build up inthe cooling passages and block the heatsink of the CPU it would have to have a few years on it or you are using it in a very dusty enviroment which isn't a great idea for any Electronic Device.

If the area you are using it in is clean and realitively dust free they can you tell us what you mean by "HANGING" if you mean that things take time to open and come up with NonResponding that is a Software Problem or possibly a Failing Hard Drive and both are treated in different ways.

Also what do you mean by

"Although I give proper care to my laptop."

Cleaning the outside doesn't keep the unit working properly it just keeps it looking clean you also need to defrag the Hard Drive often particuarly after installing any new software as afragmented Hard Drive will slow a system down to a crawl and you'll get lots of None Responding Applications showing up. Also how many programs do you have open at any one time? Obviously the more you have running the slower the system will be so start off with only opening what you need or are using now not what you think you'll need latter.

The list goes on and on and allowing people like us to Assume is a very dangerious thing as we'll pick the strange things that happen like a Substandard Video Chip Set causing the NB to be scrap or other hardware failures so the age, the make and model and a complete description of what is actually happening and any messages it is telling you is the mininum required to start with.