Is the temp better or worse? If worse, carefully repeat the work.
Sadly because the machine has damage now, your shop would replace damaged parts.
so basically i was replacing my thermal paste and i had a few issue i managed to rip off some of the material from the motherboard when refitting my cpu cooler like the cylinder that goes around the edge of the screw fitting of the cpu cooler i also managed to scratch the back of my graphics card which i dont think would of caused this as it is very minor. Anyway i dont know what would cause this type of lagg but i have noticed when it happens if i swap my headset to a different usb port it seems to fix the issue as my mic seems to stop working when it happens i can still hear stuff but i just cant talk its very odd. im stumped i really need help