Random lag spikes after a while (GPU 2 usage goes up)

Hello.First of all,excuse me for my bad English in some bits and you should know I am not an expert in this kind of stuff. So,recently,I am starting to get some random lag spikes after a while of playing games (specifically,League of Legends and CS GO). Whenever the lag spikes happen,I check MSI afterburner and I see the GPU 2 usage going up (from near 27 to 80-90something). I am not really sure but my second GPU is Intel HD family Graphics,I dont know if it helps. Also,I haven't experienced this before. Some things to note:
I have tried checking for malware and setting up a fan below my laptop to prevent overheating. Model is Dell Inspiron 3537. I would really appreciate some help as its starting to become exhausting. If you need any further information,feel free to ask me,I will try to inform with whatever you need.

Welcome to the Forum.

Do you have a second monitor?
Does your Laptop have a discrete GPU or it uses the internal graphics?

Games makes the GPU to work hard. Do you have a hardware monitor to see if the max temperatures are below 85ºC?

Hello again. Ok so: 1) I don't have a second monitor 2)I went to dxdiag and I saw that my Intel HD Family Graphics card is internal,as for the AMD Radeon HD 8670M I will have to guess that its discrete. I think it uses the internal one. 3)I have SpeedFan and MSI but MSI refuses to co-operate so I will watch the Speed Fan's measures to see the temperature.I will inform you about it as soon as I get a lag spike.