0. Order thermal paste (non conductive), once it arrives,If I could confidently I would. It's more than time. Though conversely it's also time for a total platform upgrade anyways. Intel just needs to come out with the right chip or Ryzen 3 needs to blow everyone's pants off.
1. Turn off and uplugg everything.
2. Lie PC flat on side
3. remove side panel
4. remove fan by removing plastic grip and cable from mobo. Careful not to knock the RAM
5. Unscrew EVO evenly. I think a philips screw driver here.
6. Once EVO is off wipe old ass crusty paste off. Use whatever you want, tissue paper etc.
7. Apply rice size or slightly bigger thermal paste. To little and it doesnt spread, to much and it flows off the CPU.
8. Put EVO back in case. tighten screws evenly. Don't make it tight. EVO must hug the CPU not smother it
9. replace EVO fan with new fan. plug into mobo
10. Place cover back on
11. Lift PC plug everything in
12. Victory dance
13. Unlucky to have 13 steps so we did it in 12!