Well, besides the fact that Microsoft is trying very hard to piss anyone off, that still runs Win 7 or 8.1...
You can set up your Services properly:
http://www.blackviper.com/service-configurations/black-vipers-windows-7-service-pack-1-service-configurations/You can use the free program CCleaner once a day.
You can blow all the dust out of that laptop with "canned air" or an oil-less air compressor.
You can also do this...
Get SPECCY here: http://www.piriform.com/speccy/download ...get the
FREE version from the:
Piriform Link ...Speccy is a really nice system hardware/temperature, information Utility.
...simply install it...and run the program...then post a screen shot of the main page of the program, when posting a problem/question on these forums.