Windows 10: How can i fix my laptop?

Hello, I am having a problem with my laptop.Everytime I open a game or i run Unity Game Developing for a while, it crashes. I have deleted temporary files, I ran the sfc /scannow command, the chkdsk /f command, and the dism /online /cleanup-image /Restorehealth command, and I have updated my drivers and I have the latest Windows 10 version.I even ran a CPU test, and the windows memory diagnostics.My laptop is a notebook HP Pavilion 15.The specs are:CPU: Intel Core i7 4500UGPU: NVIDIA GeForce GT 740M / Intel HD Family8GB RAM500GB ROM SSDI have tried every tutorial possible but nothing works

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Best laptop under $800??

Well the last one I suggested seems to be the best for 650$

EDIT: to facilitate your search...

Laptop GFX benchmark list

Laptop CPU Benchmark list

 

Programs not working

In post 26 there were steps listed to fix the operating system corruption.
Are you able to follow them?
In post 29 was the suggested dism repair command.

 

I'm online from my wifi laptop but can't connect to my home network

Nope, I've tried all the steps of all the fixes listed by Dalchina and Try3 but the problem still exists. The W10 laptop refuses to access my main W7 pc (named CG16) on my home network, although it can 'see' it, ie, it shows CG16 in the network list.
The only thing I haven't tried is Dalchina's suggestion about creating a shortcut, mainly because I'm not sure where this shortcut is supposed to be. I'm assuming it has to be on the W10 laptop but I don't understand how it could work. More info please, Dalchina, if you'd be so kind.

Daymin, sorry: I have no idea what you're trying to say.